Use `db:test:load` for `rollback` alias

`db:test:prepare` will not run if there are migrations that are left to
be run. `db:test:load` will always run.
Setup jshintrc for use with syntastic vim plugin
gitx-like `git log`
Setup defaults for `rails new`
Ignore latest.dump file for database dumps
Setup zsh history options
Switch to nvm for managing node
Setup for travis CLI
Add `I18n` global to whitelist for jshint

Added by `i18n-js` gem for exposing translations in JavaScript.
Don't start `ctrlp` in mixed mode

Too many options
Ignore `tmp` and `.git` directories in completion
Configure ctrlp for faster indexing and startup

Use `ag` for indexing, share a cache in the home directory.
http://stackoverflow.com/questions/21346068/slow-performance-on-ctrlp-it-doesnt-work-to-ignore-some-folders