Bump config jar to version 0.2.1
Bump config jar to version 0.2.1

 * this has no actual effect because the copy of config
   internal to Akka is used instead, but it's less
   confusing.

 * 0.2.1 contains a fair number of bugfixes vs. 0.1.6

 * 0.2.1 no longer has the Scala ABI version in the artifact,
   since the config lib is implemented in Java.

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