Major progress on Gradle port

Complete:
--------
- src/* documentation resources moved to 'docs' subproject

- docbook sources upgraded to Docbook 5

- formatted all docbook sources to strip tab characters and
  eliminate trailing whitespace

- all projects compile and test successfully

- all artifacts upload successfully to s3, static.sf.org, etc.

Remaining:
---------
- documentation L&F needs work. CSS, images, and highlighting aren't
  hooked up properly

- spring-integration-jdbc codegen bits in Maven POM need to be
  transcribed into gradle

- dependencies that were optional or provided scope in maven are
  currently 'compile' scope in Gradle.  Need to figure out support
  in Gradle to fix this.

- run through Eclipse classpath and project generation scenarios

- delete all Maven artifacts

docs/src/reference/resources/css/highlight.css

@@ -0,0 +1,35 @@
+/* 
+   code highlight CSS resemblign the Eclipse IDE default color schema
+   @author Costin Leau
+*/
+
+.hl-keyword {
+  color: #7F0055;
+  font-weight: bold; 
+}
+
+.hl-comment {
+  color: #3F5F5F;
+  font-style: italic;
+}
+
+.hl-multiline-comment {
+  color: #3F5FBF;
+  font-style: italic;
+}
+
+.hl-tag {
+  color: #3F7F7F;
+}
+
+.hl-attribute {
+  color: #7F007F;
+}
+
+.hl-value {
+  color: #2A00FF;
+}
+
+.hl-string {
+  color: #2A00FF;
+}

docs/src/reference/resources/css/html.css

@@ -0,0 +1,421 @@
+body {
+    text-align: justify;
+    margin-right: 2em;
+    margin-left: 2em;
+}
+
+a,
+    a[accesskey^
+
+=
+"h"
+]
+,
+a[accesskey^
+
+=
+"n"
+]
+,
+a[accesskey^
+
+=
+"u"
+]
+,
+a[accesskey^
+
+=
+"p"
+]
+{
+font-family: Verdana, Arial, helvetica, sans-serif
+
+;
+font-size:
+
+12
+px
+
+;
+color: #003399
+
+;
+}
+
+a:active {
+    color: #003399;
+}
+
+a:visited {
+    color: #888888;
+}
+
+p {
+    font-family: Verdana, Arial, sans-serif;
+}
+
+dt {
+    font-family: Verdana, Arial, sans-serif;
+    font-size: 12px;
+}
+
+p, dl, dt, dd, blockquote {
+    color: #000000;
+    margin-bottom: 3px;
+    margin-top: 3px;
+    padding-top: 0px;
+}
+
+ol, ul, p {
+    margin-top: 6px;
+    margin-bottom: 6px;
+}
+
+p, blockquote {
+    font-size: 90%;
+}
+
+p.releaseinfo {
+    font-size: 100%;
+    font-weight: bold;
+    font-family: Verdana, Arial, helvetica, sans-serif;
+    padding-top: 10px;
+}
+
+p.pubdate {
+    font-size: 120%;
+    font-weight: bold;
+    font-family: Verdana, Arial, helvetica, sans-serif;
+}
+
+td {
+    font-size: 80%;
+}
+
+td, th, span {
+    color: #000000;
+}
+
+td[width^
+
+=
+"40%"
+]
+{
+font-family: Verdana, Arial, helvetica, sans-serif
+
+;
+font-size:
+
+12
+px
+
+;
+color: #003399
+
+;
+}
+
+table[summary^
+
+=
+"Navigation header"
+]
+tbody tr th[colspan^
+
+=
+"3"
+]
+{
+font-family: Verdana, Arial, helvetica, sans-serif
+
+;
+}
+
+blockquote {
+    margin-right: 0px;
+}
+
+h1, h2, h3, h4, h6, H6 {
+    color: #000000;
+    font-weight: 500;
+    margin-top: 0px;
+    padding-top: 14px;
+    font-family: Verdana, Arial, helvetica, sans-serif;
+    margin-bottom: 0px;
+}
+
+h2.title {
+    font-weight: 800;
+    margin-bottom: 8px;
+}
+
+h2.subtitle {
+    font-weight: 800;
+    margin-bottom: 20px;
+}
+
+.firstname, .surname {
+    font-size: 12px;
+    font-family: Verdana, Arial, helvetica, sans-serif;
+}
+
+table {
+    border-collapse: collapse;
+    border-spacing: 0;
+    border: 1px black;
+    empty-cells: hide;
+    margin: 10px 0px 30px 50px;
+    width: 90%;
+}
+
+div.table {
+    margin: 30px 0px 30px 0px;
+    border: 1px dashed gray;
+    padding: 10px;
+}
+
+div .table-contents table {
+    border: 1px solid black;
+}
+
+div.table > p.title {
+    padding-left: 10px;
+}
+
+table[summary^
+
+=
+"Navigation footer"
+]
+{
+border-collapse: collapse
+
+;
+border-spacing:
+
+0
+;
+border:
+
+1
+px black
+
+;
+empty-cells: hide
+
+;
+margin:
+
+0
+px
+
+;
+width:
+
+100
+%
+;
+}
+
+table[summary^
+
+=
+"Note"
+]
+,
+table[summary^
+
+=
+"Warning"
+]
+,
+table[summary^
+
+=
+"Tip"
+]
+{
+border-collapse: collapse
+
+;
+border-spacing:
+
+0
+;
+border:
+
+1
+px black
+
+;
+empty-cells: hide
+
+;
+margin:
+
+10
+px
+
+0
+px
+
+10
+px
+
+-
+20
+px
+
+;
+width:
+
+100
+%
+;
+}
+
+td {
+    padding: 4pt;
+    font-family: Verdana, Arial, helvetica, sans-serif;
+}
+
+div.warning TD {
+    text-align: justify;
+}
+
+h1 {
+    font-size: 150%;
+}
+
+h2 {
+    font-size: 110%;
+}
+
+h3 {
+    font-size: 100%;
+    font-weight: bold;
+}
+
+h4 {
+    font-size: 90%;
+    font-weight: bold;
+}
+
+h5 {
+    font-size: 90%;
+    font-style: italic;
+}
+
+h6 {
+    font-size: 100%;
+    font-style: italic;
+}
+
+tt {
+    font-size: 110%;
+    font-family: "Courier New", Courier, monospace;
+    color: #000000;
+}
+
+.navheader, .navfooter {
+    border: none;
+}
+
+div.navfooter table {
+    border: dashed gray;
+    border-width: 1px 1px 1px 1px;
+    background-color: #cde48d;
+}
+
+pre {
+    font-size: 110%;
+    padding: 5px;
+    border-style: solid;
+    border-width: 1px;
+    border-color: #CCCCCC;
+    background-color: #f3f5e9;
+}
+
+ul, ol, li {
+    list-style: disc;
+}
+
+hr {
+    width: 100%;
+    height: 1px;
+    background-color: #CCCCCC;
+    border-width: 0px;
+    padding: 0px;
+}
+
+.variablelist {
+    padding-top: 10px;
+    padding-bottom: 10px;
+    margin: 0;
+}
+
+.term {
+    font-weight: bold;
+}
+
+.mediaobject {
+    padding-top: 30px;
+    padding-bottom: 30px;
+}
+
+.legalnotice {
+    font-family: Verdana, Arial, helvetica, sans-serif;
+    font-size: 12px;
+    font-style: italic;
+}
+
+.sidebar {
+    float: right;
+    margin: 10px 0px 10px 30px;
+    padding: 10px 20px 20px 20px;
+    width: 33%;
+    border: 1px solid black;
+    background-color: #F4F4F4;
+    font-size: 14px;
+}
+
+.property {
+    font-family: "Courier New", Courier, monospace;
+}
+
+a code {
+    font-family: Verdana, Arial, monospace;
+    font-size: 12px;
+}
+
+td code {
+    font-size: 110%;
+}
+
+div.note * td,
+    div.tip * td,
+    div.warning * td,
+    div.calloutlist * td {
+    text-align: justify;
+    font-size: 100%;
+}
+
+.programlisting .interfacename,
+    .programlisting .literal,
+    .programlisting .classname {
+    font-size: 95%;
+}
+
+.title .interfacename,
+    .title .literal,
+    .title .classname {
+    font-size: 130%;
+}
+
+/* everything in a <lineannotation/> is displayed in a coloured, comment-like font */
+.programlisting * .lineannotation,
+    .programlisting * .lineannotation * {
+    color: green;
+}

docs/src/reference/resources/css/manual.css

@@ -0,0 +1,69 @@
+@IMPORT url("highlight.css");
+
+html {
+  padding:       0pt;
+  margin:        0pt;
+}
+
+body {
+  margin-left:   10%;
+  margin-right:  10%;
+  font-family:   Arial, Sans-serif;
+}
+
+div {
+  margin:        0pt;
+}
+
+p {
+  text-align:    justify;
+}
+
+hr {
+  border:        1px solid gray;
+  background:    gray;
+}
+
+h1,h2,h3,h4 {
+  color:         #234623;
+  font-family:   Arial, Sans-serif;
+}
+
+pre {
+  line-height:   1.0;
+  color:         black;
+}
+
+pre.programlisting {
+  font-size:     10pt;
+  padding:       7pt 3pt;
+  border:        1pt solid black;
+  background:    #eeeeee;
+  clear:         both;
+}
+
+div.table {
+  margin:        1em;
+  padding:       0.5em;
+  text-align:    center;
+}
+
+div.table table {
+  display:       table;
+  width:         100%;
+}
+
+div.table td {
+  padding-left:  7px;
+  padding-right: 7px;
+}
+
+.sidebar {
+    float: right;
+    margin: 10px 0 10px 30px;
+    padding: 10px 20px 20px 20px;
+    width: 33%;
+    border: 1px solid black;
+    background-color: #F4F4F4;
+    font-size: 14px;
+}

docs/src/reference/resources/css/stylesheet.css

@@ -0,0 +1,99 @@
+@IMPORT url("highlight.css");
+
+html {
+  padding:       0pt;
+  margin:        0pt;
+}
+
+body {
+  margin-left:   10%;
+  margin-right:  10%;
+  font-family:   Arial, Sans-serif;
+}
+
+div {
+  margin:        0pt;
+}
+
+p {
+  text-align:    justify;
+}
+
+hr {
+  border:        1px solid gray;
+  background:    gray;
+}
+
+h1,h2,h3,h4 {
+  color:         #234623;
+  font-family:   Arial, Sans-serif;
+}
+
+pre {
+  line-height:   1.0;
+  color:         black;
+}
+
+pre.programlisting {
+  font-size:     10pt;
+  padding:       7pt 3pt;
+  border:        1pt solid black;
+  background:    #eeeeee;
+  clear:         both;
+}
+
+div.table {
+  margin:        1em;
+  padding:       0.5em;
+  text-align:    center;
+}
+
+div.table table {
+  display:       table;
+  width:         100%;
+}
+
+div.table td {
+  padding-left:  7px;
+  padding-right: 7px;
+}
+
+.sidebar {
+    float: right;
+    margin: 10px 0 10px 30px;
+    padding: 10px 20px 20px 20px;
+    width: 33%;
+    border: 1px solid black;
+    background-color: #F4F4F4;
+    font-size: 14px;
+}
+
+.mediaobject {
+    padding-top: 30px; 
+    padding-bottom: 30px; 
+}
+
+.legalnotice {
+    font-family: Verdana, Arial, helvetica, sans-serif;
+    font-size: 12px;
+    font-style: italic;
+}
+
+p.releaseinfo {
+    font-size: 100%;
+    font-weight: bold;
+    font-family: Verdana, Arial, helvetica, sans-serif;
+    padding-top: 10px;
+}
+
+p.pubdate {
+    font-size: 120%;
+    font-weight: bold; 
+    font-family: Verdana, Arial, helvetica, sans-serif;
+}
+
+span.productname {
+    font-size: 200%;
+    font-weight: bold; 
+    font-family: Verdana, Arial, helvetica, sans-serif;
+}