Updated contributor guidelines
Updated contributor guidelines

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