add spring-completion.rb

Closes #22.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Add pip completion script

Closes #25.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
added bundler completion

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
added gem completion

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
added ruby completion

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Merge branch 'wp-cli' of https://github.com/chrisopedia/homebrew-completions into wp-cli
Update versioned URL & add checksum