Removed "this" from grunt.file in a few places.
Removed "this" from grunt.file in a few places.

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