Add a couple of aliases for ARM-related stuff.
- Add an alias to show files that changed with a commit.
- Push the current branch by default instead of requiring it to be
  specified.
Automatically set linewrap rules for text and email.
Improve usage().
Add a function to update the master branch in my FreeBSD repo.
Merge branch 'master' of github.com:markjdb/dotfiles

Conflicts:
	vimrc