Fix `ll` to modify ~/.localrc.zsh

Instead of ~/localrc.zsh
Remove airline conditional

The airline options wouldn't load until the file was sourced again.
It seems Airline is unavailable when vim is first loaded.
Minor edit: change setting comments
Restore ,w map and use m for writing & making

m should only make if it can do so without errors.
Fix airline symbols error on VimEnter
Update antigen 3/15/14
Add antigen/tmux plugins only if they're installed