Add Gemfile

There doesn't seem to be a nice way to do this with Ruby though.  Need
to look into it more.  The only tool available seems to be Bundler, but
I'm not sure that's what I need here.
Add daily run
Install RVM as part of bootstrap

Still need to modify Gemfile usage to use RVM instead.  I've read on the
web that this is advisable.
Add ronn gem
Add terminal-notifier
Add github gem
Merge branch 'master' into migrate-emacs

Conflicts:
	Brewfile