Fixed Grunt watch targets to properly include subdirectories

The previous watch target patterns were of the form,     
   "pathX/{,*/}*.suf", 
but should be 
   "pathX/{,**/}*.suf" 
to properly imply 
   "pathX/*.suf" for top level and 
   "pathX/**/*.suf" for subdirectory search.

There are other areas that require this treatment, but I am too new to grunt, yeoman, et al to risk any further changes. I leave it to my betters :)