Issue: SPR-14693

Since appcache manifests can have various file extensions, developers
should register the (file extension, media type) mapping in their Spring
MVC / Reactive Web configuration.

This commit adds javadoc on both `AppCacheManifestTransformer` variants
to explain how to do that.

Issue: SPR-14510

Latest dependency updates (Undertow 1.4.3, EhCache 3.1.2, Caffeine 2.3.3, Rome 1.7, Woodstox 5.0.3, Jettison 1.3.8, JRuby 9.1.5.0, RxJava 2.0 RC2, RxNetty 0.5.2 RC4)

Issue: SPR-14725

Improve RootBeanDefinition to specify an AnnotatedElement that holds
qualifier information. When such element is present, any qualifier that
it defines will be used to find a matching candidate.

Issue: SPR-14725

Issue: SPR-14718

Issue: SPR-14669

Rather than setting the status to 503 directly from the timeout
interceptor which no longer seems to work reliably with Servlet
containers like Jetty even performing an additional ERROR dispatch back
to the original URL, we know rather set the DeferredResult to an
AsyncTimeoutException, which results in a dispatch and standard
handling within Spring MVC. This should be a more reliable way of
dealing with timeouts.

Issue: SPR-14669

Issue: SPR-14643

Issue: SPR-14703

Added readableChannel() to Resource, which returns a
java.nio.ReadableByteChannel. The default implementation uses
Channels.newChannel() to create a channel based on what is returned from
getInputStream(). Subclasses have more effecient, file-based
implementations.

Issue: SPR-14698

* pr/1172:
  Fix doc style

Closes gh-1172

This commit updates the two transformers to make them more
consistent with updates of their spring-web-reactive equivalents.

Issue: SPR-14521

Issue: SPR-14521

(cherry picked from commit 54db4968)

Issue: SPR-14709
(cherry picked from commit fbe7ddb6)

Issue: SPR-14661

Issue: SPR-14686

Issue: SPR-14684

Issue: SPR-14681

Issue: SPR-14666

Issue: SPR-14699

Issue: SPR-14675

Issue: SPR-14697

Issue: SPR-8337

Removed accidentally added ModelAndView class.

Fixed bug where the returned Flux from DataBufferUtils.read() would be
completed prematurely if the channel was not ready to read, but did
not reach the end of the file either.

In RoutingFunction, renamed 'and' to 'andSame', and 'andOther' to
'and' to make the commonly used method name shorter.

Merged all *Response implementations into one DefaultResponses class

This commit introduces template rendering support in the web.reactive
package, through a Response.render method and a Rendering interface.

From context, It seems that the first word "method" is needless,