Bumping dev version to v0.3.1a.
Bumping dev version to v0.3.1a.

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