Added comment operator (modelled after delete/change operator).

Takes a motion or text object and comments it.  Also yanks to clipboard.

Not assigned to any key yet.
Replaced default evil setup with , operator
Added check for evil-define-operator
Updated readme

Slight indentation fix
Updated description
Changed word to WORD (which goes through symbolic characters)
Moved operator to evil section
Removed redundant double information
Added check for comment operator being bound
Updated snippet to reflect code
Streamlined evil section
Made , work in visual mode as well
Added visual map to readme recommendations
Added additional evil example
Added "comment to line" evil example
Made definition of evilnc-comment-operator a callable function, evilnc-define-comment-operator.  Only does anything if 'evil-define-operator bound and 'evilnc-comment-operator isn't.

It gets called when evilnc first gets loaded, when user calls it, and when user calls evilnc-default-hotkeys.
v1.2.0

- adjust hokey to respect evil-leader
- uncomment text object