See gh-369

Change the pidfile property from `spring.application.pidfile` to
`spring.pidfile` (to save confusion with SpringApplication properties).

Also added documentation and meta-data information.

See gh-1579

Fix an issue where debug logging never occurred because it was guarded
incorrectly using isWarnEnabled().

Fixes gh-1780

Some were missing, some were named incorrectly.

See gh-1827

Rename 'additional-spring-configuration-metadata.json' to
'spring-configuration-metadata.json' and drop the annotation processor.

The project has no @ConfigurationProperties defined so the annotation
processor didn't kick in.

Fixes gh-1830

See gh-1831

* spring-boot-1412:
  Add fork option for mvn spring-boot:run

Closes gh-1483

Update RunMojo to include a `fork` option and change the default
to only fork if agent or jvmArguments are specified.

Fixes gh-1412

Update ApplicationPidFileWriter to support the Spring Environment,
picking up the `spring.application.pidfile` property if specified.

Fixes gh-1579

* gh-1777:
  Add PropertiesPropertySourceLoader test
  Add XML support to PropertiesPropertySourceLoader

Fixes gh-1777
Closes 1783

Create a PropertyNamePatternsMatcher strategy interface that
PropertySourcesPropertyValues can use to determine when a property
can be used.

PropertiesConfigurationFactory uses DefaultPropertyNamePatternsMatcher
which is heavily optimized for frequent calls.

Fixes gh-1823

Update ConfigurationPropertiesBindingPostProcessor to ensure that
the defaultConversionService is only created once.

Fixes gh-1822

Disable JTA auto-configuration altogether with a simple property. This
can be useful if the environment is JTA capable but the application does
not require it.

Fixes gh-1457

Enable ConditionalOnJndi evaluation and add tests that validate it works
as expected

Fixes gh-1820

Override the default StringHttpMessageConverter provided by the standard
Spring MVC configuration so that is uses UTF-8 instead of the aging
default of the servlet spec (that is ISO-8859-1)

Fixes gh-1800

Fixes gh-1816

See gh-1590

Fixes gh-1104

If the DataSource is a Tomcat one we force it to register an MBean
if spring.jmx.enabled=true

Fixes gh-1590

This commit updates the help command to also show some example(s) to
illustrate how the command can be used. The commit also defines useful
examples for the init command

Fixes gh-1809

This commit reworks a7e1ec84 to fix the build failure and update the
documentation regarding default maven filtering option with
spring-boot-starter-parent

Fixes gh-1199

Prior to this commit, specifying the --format and/or --build options
alongside --type did not use the explicit type as it should. This commit
ignores the --build and --format options if a type is explicitly set.

Fixes gh-1807

Closes gh-1709

It *is* very useful to have filtering on by default, so that is now
the case (in spring-boot-starter-parent). Users can filter resources
by default by adding @*@ placeholders (so as not to clash with Spring
${} placeholders).

Fixes gh-1199

This commit moves the --output switch to a regular argument. This aligns
to other command, i.e. spring init my-project.zip would save the project
to "my-project.zip" in the current directory.

This commit also auto-detects the --extract option if the location ends
with a slash, i.e. spring init demo/ would extract the content of the
project in a demo directory that is local to the current directory.

Fixes gh-1802

The old resolver class is deprecated already, and there's no reason
to continue to support the View and View resolver implementations
from Boot 1.1, so I removed those. Also there is no need to support
older versions of Groovy, so I removed a config class that was
conditional on a groovy version (by looking for the markup support).

Fixes gh-1578

Update `GroovyTemplateAutoConfiguration` to use Spring 4.1 Groovy
Markup Template infrastructure instead of Boot's.

Fixes gh-1552

Add an appendix to the reference documentation describing the format
of configuration meta-data and how the annotation processor can be used.

Closes gh-1001

Add a @NestedConfigurationProperty annotation which can be used to
customize how configuration mete-data is generated.

Prior to this commit only inner-classes where considered nested
(see Tomcat in ServerProperties). Using this new annotation, the Ssl
property in ServerProperties can be detected as well.

See gh-1001