Add vim-javascript plugin for better JS support
Bind Ctrl-p in Zsh to run the last command

This is useful when your TDD loop consists of the following:

- Edit stuff in your editor
- Save and Ctrl-Z to suspend
- run_tests || read ; fg
- Repeat

It eases the keyboard stretch of hitting Up-Arrow then enter to run the
last command, and allows you to keep your finger on the Ctrl key by just
doing Ctrl-z Ctrl-p.
Bind Ctrl-z in Zsh to foreground current background job