Adding CHANGELOG changes for 0.4.2. Closes gh-941.
Adding CHANGELOG changes for 0.4.2. Closes gh-941.

Chhunlong/grunt,coldrye-collaboration/grunt,pandeysoni/grunt,felixgrey/grunt,yonglehou/grunt,yosiazwan/grunt,modulexcite/grunt,thecc4re/gruntjs,r14r-work/fork_grunt_master,lkiarest/grunt,eelve/grunt,youmyyou/grunt,paulcbetts/grunt,fscherwi/grunt,thejameskyle/grunt,FeodorFitsner/grunt,JaKXz/grunt,paladox/grunt,abraheem/grunt,arosa81/grunt,IveWong/grunt,ThiagoGarciaAlves/grunt,q310550690/grunt,vladikoff/grunt,r14r/fork_grunt_master,yuhualingfeng/grunt,zackexplosion/grunt,imjerrybao/grunt,shama/grunt,goodeggs/grunt