colortest: strip newline
vim: declare the mapleader before using it
ag / ack: replacing ack with ag
vim: big reworking

- enable hidden mode
- disable colorcolumn
- increase sidescrolloff
- give showbreak a custom unicode character
- replace ack with ag for grepprg
- disable nowrap
- disable textwidth
- migrate individual configuration groups to vim/settings/ so they're
  easier to load
  - migrate GUI config to theme
  - migrate TMUX stuff to terminal.vim
- replace unite with ctrl-p; it just works as I expect
- nmap ,w as "replace whitespace" function
- nmap _ and | as split creators
- nmap S and C-s as save
- nmap X as intelligent close (buffer or window)
- nmap C-x as :qa
- nmap K as :grep
- nmap // as :nohilight
- disable nmap ,, as :nohighlight
- disable nmap ,cd mapping
- disable nmap ,bd / ,bl mapping for background toggle, may re-enable this
- nmap ,b as ctrl-p buffer mode
- nmap ,f as ctrl-p file mode
- replace nmap ,r as ctrl-p recent mode
- disable nmap ,tp as toggle paste mode
- disable unite mappings under ,u
- show git branch name in statusbar