ignore vim swap files and OS X junk
fix bug where Alien::MSYS was being used on non windows
Merge pull request #52 from plicease/msys_fix

fix bug where Alien::MSYS was being used on non windows

Since this only fixes a feature that has already been approved, I am going to go ahead and merge.  if there are any concerns, please let me know.
Merge pull request #49 from preaction/gitignore

Add vim swap files and OS X junk to gitignore