Git alias for deleteing merged branches

Delete all branches that are merged into master. Any branches that aren't
merged will fail to delete, which is good. This probably won't work for you
if you have other local branches tracking master.
Alias `git rh` to `git reset HEAD`

Can also take filenames as additional arguments.
Remove iTerm plist, for now

Might be able to manage this with a Puppet type instead of a binary file.