extract akka example code from scala doc
extract code from scala cache doc
fix package name
Fixed documentation for Action.async.
Update the json contraints error messages with the play defaults
Remove the validate prefix of the JSON error
Add the json api error keys, correct those containing dashes
Set Vary header when doing content negotiation based on the Accept header (#1105)
Report errors with keystores

Code for loading the keyStore can throw an exception, which was
silently ignored.  By moving it inside an existing try-catch block, the
exception is reported in the log.

Also added an integration test.
Merge pull request #1236 from bwbecker/master

Using an invalid certificate keyStore should be (at least) reported in the log rather than failing silently.
Merge pull request #1232 from julienrf/fix/1105

Set Vary header when doing content negotiation based on the Accept header (#1105)
Merge pull request #1193 from XuefengWu/extract-code-scala-cache

extract code from scala cache doc
Merge pull request #1195 from tototoshi/fix-action-async-documentation

Fixed documentation for Action.async.
Merge pull request #1192 from XuefengWu/extract-doccode-scala-akka

extract akka example code from scala doc
Merge pull request #1212 from Timshel/wip-jsonerror

Modification of the JS ValidationError keys
Pulled play-cache out of play-core

* Also fixed #1012, renamed ehcache.xml to ehcache-default.xml, and made this a
  fallback, to prevent classpath ordering issues
Updated contributing links to cache source code
Added play-cache dependency to documentation