[bs-59] Add zip packaging for cli module

* Also added "spring" shell script (in zip), so you can
unzip it and run out of the box
* To run in developer mode use SPRING_HOME, e.g.

        $ cd spring-bootstrap-cli
        $ SPRING_HOME=target src/main/scripts/spring run samples/web.groovy
* Also added "clean" command to remove spring bootstrap grapes
(useful to force a refresh of snapshot jars)

[#48644271]

spring-bootstrap-cli/src/main/scripts/spring

@@ -0,0 +1,74 @@
+#!/bin/bash
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false;
+darwin=false;
+case "`uname`" in
+    CYGWIN*)
+        cygwin=true
+        ;;
+        
+    Darwin*)
+        darwin=true
+        ;;
+esac
+
+if [ -z "${JAVA_HOME}" ]; then
+    if $darwin ; then 
+        [ -z "$JAVA_HOME" -a -f "/usr/libexec/java_home" ] && export JAVA_HOME=`/usr/libexec/java_home`
+        [ -z "$JAVA_HOME" -a -d "/Library/Java/Home" ] && export JAVA_HOME="/Library/Java/Home"
+        [ -z "$JAVA_HOME" -a -d "/System/Library/Frameworks/JavaVM.framework/Home" ] && export JAVA_HOME="/System/Library/Frameworks/JavaVM.framework/Home"
+    else
+        javaExecutable="`which javac`"
+        [ -z "$javaExecutable" -o "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ] && die "JAVA_HOME not set and cannot find javac to deduce location, please set JAVA_HOME."
+        # readlink(1) is not available as standard on Solaris 10.
+        readLink=`which readlink`
+        [ `expr "$readLink" : '\([^ ]*\)'` = "no" ] && die "JAVA_HOME not set and readlink not available, please set JAVA_HOME."
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+        JAVA_HOME="$javaHome"
+        export JAVA_HOME
+    fi
+fi
+
+if [ ! -f "${JAVA_HOME}/bin/java" ]; then
+	echo ""
+	echo "======================================================================================================"
+	echo " Please ensure that your JAVA_HOME points to a valid Java SDK."
+	echo " You are currently pointing to:"
+	echo ""
+	echo "  ${JAVA_HOME}"
+	echo ""
+	echo " This does not seem to be valid. Please rectify and restart."
+	echo "======================================================================================================"
+	echo ""
+	exit 1
+fi
+
+if [ "$SPRING_HOME" == "" ]; then
+    SPRING_HOME=`cd "$(dirname $0)"/.. && pwd`
+fi
+SPRING_BIN=$(dirname $0)
+
+TARGETDIR=target/classes
+if [ -f build.gradle ]; then
+    TARGETDIR=build/classes/main
+fi
+mkdir -p "${TARGETDIR%/}"
+
+CLASSPATH="${SPRING_BIN}":"${TARGETDIR}"
+
+for f in "${SPRING_HOME}"/lib/*.jar; do
+    CLASSPATH="${CLASSPATH}":$f
+done
+
+for f in "${SPRING_HOME}"/*.jar; do
+    CLASSPATH="${CLASSPATH}":$f
+done
+
+if $cygwin; then
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+fi
+
+${JAVA_HOME}/bin/java -cp "$CLASSPATH" org.springframework.bootstrap.cli.SpringBootstrapCli $*