Update brew.plugin.zsh

Add `brew cleanup` command to `bubu` alias
Merge pull request #2969 from nicolas-brousse/patch-1

Update brew.plugin.zsh
Add 'chris' theme
Update zsh prompt
Add custom dir to repo
Remove Climate aliases
Remove spec alias
Add irc alias for weechat-curses
Remove before and after context on grep alias
Add gap alias, remove grep alias
Add custom scripts to repository
Rename scripts to have correct load order
Remove unnecessary init scripts
Change LSCOLORS to better match Thayer color scheme
Move path stuff to oh-my-zsh config
Add node binaries to path
Remove custom LS colors for zsh
Remove custom Square stuff
Remove DYLD_LIBRARY_PATH from environment
Add alias for sending tmux buffer to pbcopy