Bundle Github color scheme

Fixes https://github.com/thoughtbot/dotfiles/issues/79
Replace s shell script with rspec shell function and alias

* Use a regular alias to make `s` short for `rspec`
* Use an `rspec` shell function to route to zeus when appropriate
* Removes confusion from `s` working differently than `rspec`
* Removes need to use a special alias to get zeus working
Merge branch 'dc-github-color' into upstream
Add aliases for most common git commands
Use Zeus via aliases, rake

* Create `rake` function and `rk` alias.
* Add `z` alias for `zeus`.
* Alias `migrate` to `m` given how common a task it is.
Pass arguments from rspec shell function when not using zeus

* Non-zeus path didn't pass arguments, so it just ran `rspec`
Bundle Ctrl+P

Full path fuzzy file, buffer, mru, tag, ... finder for Vim.
https://github.com/kien/ctrlp.vim
Merge pull request #2 from thoughtbot/master

merge