Add antigen for zsh
Add bootstrap script
Remove oh-my-zsh submodule
Remove useless tmux simlink
Add command-not-found plugin
Fix version checking
Make clearing whitespace functions nicer

With this commit they work faster and don't affect search highlighting
Disable displaying tab listchar
Stop showing --Insert-- and --Visual-- on CmdLine

Airline already displays this information, and in a nicer way.
fixup! Fix version checking
Add Brewall's changes
Merge Brewall's remote changes with its local ones