Older versions of JBoss AS have a classpath clash with an older
SLF4J (pre 1.6.5), so to prevent an app from blowing up on
startup we defensively catch a NoSuchMethodError.

Fixes gh-339

Locate PropertySourcesLoaders using SpringFactoriesLoader and refactor
the interface to expose file extensions and support 'profiles' within
documents.

Rework ConfigFileApplicationListener for consistent profile loading.
Profiles are now loaded in a consistent order for both profile specific
files, and contained profile documents (i.e. YAML sub-sections).

Also update ConfigFileApplicationListener so that it no longer directly
processes @ProperySource annotations. Instead the standard Spring
ConfigurationClassPostProcessor will insert @PropertySource items with
ConfigFileApplicationListener later re-ordering them.

The SpringApplication can no longer be configured using @ProperySource
annotations, however, application.properties may still be used.

Fixes gh-322

Update ConfigFileApplicationListener so that custom names and custom
locations use consistent ordering. i.e. earlier items take precedence
(same as @ProperySource).

Add "my.property" to `application.properties` in order to test ordering
or property sources.

Also use hamcrest for assertions.

Update javadoc to consistently use the "code" style with <pre> blocks.
Also include the latest spring-javadoc.css formatting file.

Fixes gh-332

Change `EmbeddedWebApplicationContext` to no longer automatically call
`registerShutdownHook()`. Shutdown hooks must now be registered by the
caller (for users of SpringApplication this will happen automatically).

Fixes gh-314

* pull336:
  Now custom SpringApplication class can be used when extending SpringApplicationContextLoader

Previously the core Spring processing of @PropertySource would
resolve placeholders in the location attribute, but the pre-loading
of the property source by Spring Boot didn't do that. Now implemented
using Environment.resolvePlaceholders() (N.B. at a time when the only
Environment entries available are system properties and OS env vars).

E.g.

	@Configuration
	@PropertySource("classpath:/${source.location}.properties")
	protected static class WithPropertySourcePlaceholders {
           ...
	}

When binding a nested map structure, RelaxedDataBinder pre-populates
the target object with default empty maps. Previously, when these
structures overlapped, each step in pre-population process could
potentially overwrite what had come before it. This led to the output
of the pre-population process being incomplete which would lead to a
binding failure.

This commit updates the pre-population process so that it checks to see
if a property's value has already been set by an earlier step in the
process. If it has been set, the existing value is now reused rather
than being overwritten by a new empty map.

Fixes #328

Previously, the Gradle plugin would package all of a project's
dependencies in the jar's lib directory, irrespective of each
dependency's type. This led to non-jar artifacts being packaged in
the lib directory where only jar dependencies are expected. See #334
for an example failure.

This commit updates the Gradle plugin such that it only packages
dependencies of type jar, ejb, ejb-client, test-jar, or bundle. This
brings the Gradle plugin into line with the Maven plugin.

Fixes #334.

Ignore JMS sample which intermittently fails to run on CI.

See gh-323

Update the `ArtifactsLibraries` used by the maven plugin to filter
based on artifact types. This prevent `.pom` files from accidentally
being packaged in `/libs` and ultimately resulting in 'Unable to find
ZIP central directory records' errors.

Fixes gh-324

Revert commit a97bcfe3 as adding
profiles automatically may be problematic.

Updates gh-296

* gradle-mainclass:
  Add mainClass option for Repackage task

Add `mainClass` property option to the Repackage task. If the property
is defined within a task, it works in the same way as if it defined
within the springBoot{} 'ext' properties section.

Option is valid only for that specific task where it is defined, and
will override option defined in springBoot{} ext properties.

Fixes gh-283

* patch-1:
  Prevent 404s in README.md links

Fix links to ensure that they don't cause 404 errors when published to
Github Pages.

Fixes gh-304

* pull313:
  Document that applicaiton.yml requires snakeyaml

Update documentation to reference the need for a yaml library to be on
the classpath.

Fixes gh-313

Add a setRegisterShutdownHook option to SpringApplication allowing the
shutdown hook to not be registered.

Also update SpringApplicationBuilder to automatically disable shutdown
hooks for child contexts.

Fixes gh-314

Fix `EmbeddedServletContainerAutoConfiguration` so that it does not
accidentally eagerly initialize factory beans.

Fixes gh-306

Extract all inner @ConfigurationProperties classes from @Configuration
classes for consistency.

Extract Mongo auto-configuration classes from Spring Data specific
auto-configuration, allowing Mongo to be used without Spring Data
if require.

Disable Mongo auto-configuation when @EnableMongoRepositories is used
and adapt the test helper classes accordingly.

Change the property prefix and dependency management version property
from `...mongo` to `...mongodb` for consistency with Spring Data.

Fixes gh-315

Update javadoc and method names to indicate that ApplicationInitializer
and ApplicationListeners are `Order` sorted before being invoked.

Also remove specific sorting from SpringApplicationBuilder, relying
instead on the Order sorting.

Fixes gh-316

Prefer Ordered HIGHEST_PRECEDENCE and LOWEST_PRECEDENCE constants to
Integer MAX_VALUE or MIN_VALUE.

Improve package structure and attempt to co-locate related classes.

Restore the previous `spring.profiles.active` logic effectively
reverting commit 37069d91. This ensures that active profiles defined in
a higher `PropertySource` replace those lower down.

In addition, add support for a `+` prefix that can be used to indicate
that a profile should be added to the active set.

For example:

	# application-prod.properties
	spring.profiles.active=+proddb,+prodmq

Fixed gh-308, gh-309

Update ErrorMvcAutoConfiguration thymeleaf condition to use the
`spring4` package.

Fixes gh-310

Fixes gh-312