checkpointing previous changes.
Checkstyle and api-doc works.  Only one of PMD and Jacoco can work
Updating README
typos
minor docs
Merge branch 'play-2.2'

Conflicts:
	README.md
	build.sbt
	doc/test/ApplicationTest.java
	project/CheckstyleSettings.scala
	project/PmdSettings.scala
	project/plugins.sbt
	test/IntegrationTest.java