Fixes Vim spelling colors
Allow running base16 from anywhere in the PATH

Refactor the main executable to be able to handle relative paths.
output continues to go to <path/to/executable>/output
Merge pull request #25 from zehrizzatti/refactor_executable

Allow running base16 from anywhere in the PATH
Merge branch 'master' of git://github.com/chriskempson/base16-builder

* 'master' of git://github.com/chriskempson/base16-builder:
  Allow running base16 from anywhere in the PATH
  Fixes Vim spelling colors