Line Ending Normalization
Add ability to source/import file sans selection

Added the ability to source mel file or import and reload python module.
This sends the current view/file if nothing is selected via the same
command. Added language detection to the command so removed the explicit
language arg. This also allows for a single context menu item which was
added.

Updated readme to match
removed explicit calls to language in keymap for osx and linux
using os.path for filename
Update readme and cancel on non-maya language

I'm not sure if it is possible to only show the context menu on MEL and
Python, so it just returns if it's not one of those.

Updating the readme for examples to add to the usersetup.py and indicate
that the current file must be on the user's maya path to have it
actually source/import in maya.
commented file source/import, rolled back readme
removed line in readme re sending whole file
Merge pull request #3 from juggernate/master

refactor run() command to dynamically detect language context