Add .gitattributes for consistency between Windows and Linux
Add .gitattributes for consistency between Windows and Linux

Had issues when moving between bash (via msysgit) and babun/mintty
(via cygwin).

Sources:
- http://stackoverflow.com/questions/15717077/line-endings-with-cygwin-and-github-for-windows
- https://help.github.com/articles/dealing-with-line-endings/

absynce/elm-learn,absynce/elm-learn