Do all the things

pre-commit now calls set-author-committer
Add checks for the pre-commit files and copies it if non-presesnt
Should close the conversation in #15 though real world testing won't
occur until we brew install it.
Should be MVP up in this

also whitespace update for create hook and usage

![1286878969_meteor](https://cloud.githubusercontent.com/assets/2591516/3513005/103e2086-06bf-11e4-8c6c-b7a87016ebe6.gif)

i wonder about `test -f` vs `[[ ]]` notation. 

in a later non-MVP PR let's try and standardize it?