vimrc.bundles: Add tpope/vim-commentary

Removes tComment because it doesn't support repeating. Also, Tim Pope
:green_heart:
mpv: Update config; swap volume keybindings
zsh: GOPATH, pyenv
aliases: Add gi
bin/musicmover: Refactor, add validation
bin/tvmover: Special series cases
bin/tvdb: Relocate credentials
vim: Add command to open stylesheets in CtrlP
gitconfig: Add stash pop/stash save shortcuts
mpv: Update hotkeys