* Fixes an issue where tab completing specs that start with the same
words(s) makes tab completion freak out and stop working.
* The con is that we'll see "_spec.rb" in the output, like:
```zsh
$ rspec spec/models/
models/calendar_spec.rb
models/event_closer_spec.rb
...
```
With arguments, g acts like git.
Without arguments, it runs `git status`.
* Source functions/* after loading ZSH completion so `compdef` is available to g
alias
https://github.com/ggreer/the_silver_searcher
* ag is faster than ack
* ag searches all files by default (but still ignores gitignored files). This
removes the need for ack's `--type-add=` options.
* The command is 33% shorter than ack!
* 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
