Update bower.json's main to conform to Bower's spec.
Update bower.json's main to conform to Bower's spec.

Per https://github.com/bower/bower.json-spec, "main"
should "not include minified files."

dtagdev1/ng-clip,huayun321/ng-clip,ptheofan/ng-clip,Falci/ng-clip,asafdav/ng-clip,ptheofan/ng-clip,asafdav/ng-clip,huayun321/ng-clip,dtagdev1/ng-clip,Falci/ng-clip