add revision(version) field for Post
Convert Global.scala to java and do some error page prettiness for #76
comment out failing tests
Merge branch 'master' into pickle

Conflicts:
	app/module/Global.java
	conf/evolutions/default/1.sql
	test/test/HomeControllerTest.java
	test/test/PostControllerTest.java
Merge branch 'pickle' of https://github.com/hakandilek/publicplay into pickle