implement S for synonym for cc related to issue #281,#313
Merge pull request #319 from pebble8888/shift_s

implement S for synonym for cc related to issue #281,#313
Merge commit '8facf' into refactoring

* commit '8facf':
  implement S for synonym for cc related to issue #281,#313

Conflicts:
	XVim/XVimNormalEvaluator.m