[vim] add golang and jedi modules
[ack] add restructured text filetype
[vim] .rst is indented three spaces

I think? maybe? I think I've done, and reverted this before
[zsh] use pip download cache
[zsh] use gsed if present
[zsh] bind ^Z to fg

so I can switch back and forth between a program (vim) and the shell
easily
ignore untracked for vim-golang
[vim] .go = golang
[vim] ctrlp and jedi options