Cleanup and more details.
Cleanup and more details.

- More details at the beginning on how to upgrade from Play 2.0.
- General cleanup

wegtam/playframework,hagl/playframework,playframework/playframework,marcospereira/playframework,ktoso/playframework,wegtam/playframework,hagl/playframework,zaneli/playframework,aradchykov/playframework,hagl/playframework,playframework/playframework,ktoso/playframework,benmccann/playframework,rajeshpg/playframework,mkurz/playframework,wegtam/playframework,mkurz/playframework,ktoso/playframework,Shruti9520/playframework,rajeshpg/playframework,zaneli/playframework,Shenker93/playframework,playframework/playframework,benmccann/playframework,Shenker93/playframework,zaneli/playframework,marcospereira/playframework,Shenker93/playframework,benmccann/playframework,Shruti9520/playframework,mkurz/playframework,richdougherty/playframework,Shruti9520/playframework,wsargent/playframework,rajeshpg/playframework,Shruti9520/playframework,richdougherty/playframework,wsargent/playframework,richdougherty/playframework,richdougherty/playframework,wegtam/playframework,Shenker93/playframework,wsargent/playframework,aradchykov/playframework,benmccann/playframework,aradchykov/playframework,marcospereira/playframework,rajeshpg/playframework,zaneli/playframework,mkurz/playframework,ktoso/playframework,marcospereira/playframework,aradchykov/playframework,hagl/playframework,wsargent/playframework