handling quoted charset
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
 #1248 Fix thread pool regression
Merge pull request #924 from nraychaudhuri/924_contenttype

Should work with Content-Type header like: text/xml; charset="utf-8"
Merge pull request #993 from jroper/ehcache-refactor

Pull cache out of play core
Merge pull request #1248 from jroper/1248-thread-pools

Fix thread pools regression