Update copyright header for XStreamMarshaller

Issue: SPR-9536
Work around apparent bug in README markdown parsing

The exact text above the "Staying in touch" section caused "Staying in
touch" to lose it's formatting as a second-level heading.  Adding
" for details" to the sentence above works around the problem.
Polish client support for HTTP PATCH

Issue: SPR-7985
Polish ContentNegotiationStrategy support

Issue: SPR-8410, SPR-8417, SPR-8418,SPR-8416, SPR-8419,SPR-7722
Enable smart suffix pattern match for request mapping

Following the introduction of ContentNegotiationManager that allows,
among other things, to configure the file extensions to use for content
negotiation, this change adds "smart" suffix pattern match that matches
against the configured file extensions only rather than against any
extension.

Given the request mapping "/jobs/{jobName}" and one configured file
extension ("json"), a request for "/jobs/my.job" will select the
pattern "/jobs/{jobName}" while a request for "/jobs/my.job.json" will
select the pattern "/jobs/{jobName}.json". Previously, both requests
would have resulted in the pattern "/jobs/{jobName}.*".

Issue: SPR-7632, SPR-8474
Polish PathVariableMapMethodArgumentResolver

Return an empty map when there are no path variables, rather than
raising an exception. This is consistent with similar resolvers for
extracting headers and request parameters.

Issue: SPR-9289
Fix import issue introduced in prior commit

Issue: SPR-9289
Reflect @Async executor qual. 3.2=>3.1.2 backport

@Async executor qualification has been backported to 3.1.2. This commit
updates all @since tags appropriately, as well as carrying over the
changes backported to the spring-task-3.1 schema.

Issue: SPR-6847, SPR-9443
Reflect 3.2=>3.1.2 backports in @since tags etc

Issue: SPR-9443, SPR-6847, SPR-9446, SPR-9444, SPR-9439, SPR-9302,
       SPR-9507, SPR-9238, SPR-9397, SPR-9406, SPR-9502
Improve SimpleStreamingClientHttpRequest performance

Ensure that NonClosingOutputStream calls with a byte array call the
corresponding methods of the underlying OutputStream rather than
relying on the default NonClosingOutputStream implementation, which
writes one bte at a time. This significantly improves performance.

Issues: SPR-9530
Merge pull request #101 from philwebb/SPR-9530

* SPR-9530:
  Improve SimpleStreamingClientHttpRequest performance
Reduce logging in HandlerExecutionChain

Before this change the HandlerExecitionChain logged errors each time a
an AsyncHandlerInterceptor returned a null async Callable, a condition
which is acceptable.

SPR-9524
refined fix so that XStreamMarshaller does not wrap IllegalArgumentException

Issue: SPR-9536
Use BufferedInputStream in SimpleMetaDataReader to double performance

Issue: SPR-9528
added "repeatCount" bean property to Quartz SimpleTriggerFactoryBean

Issue: SPR-9521
moved getInputStream() not-null requirement to InputStreamSource itself; removed misleading "throws IllegalStateException" declaration

Issue: SPR-9561
DispatcherPortlet does not forward event exceptions to the render phase by default

Issue: SPR-9287
polishing
preparations for 3.2 M2
Add defaultCharset field to StringHttpMessageConverter

Before this change the StringHttpMessageConverter used a fixed charset
"ISO-8859-1" if the requested content type did not specify one. This
change adds a defaultCharset field and a constructor to configure it in
StringHttpMessageConverter.

Issue: SPR-9487