fix(ng): Update angular to 1.3.15.
fix(ng): Update angular to 1.3.15.

settysreekanth/ngMask,settysreekanth/ngMask,guilhermegm/ngMask,Crunch-io/ngMask,lokesh-coder/ngMask,loansolutionsph/ngMask,BrianRidgeway/ngMask,tamtakoe/ngMask,Crunch-io/ngMask,calebeoliveira/ngMask,PetrusStarken/ngMask,shankurmahajan/ngMask,candreoliveira/ngMask