Switched back to urxvt. Renamed .Xdefaults → .Xresources.

Lots of additions to urxvt, cleaned up .Xresources a lot.
vim: Turned off tab keybinds. Use very magic search.
urxvt-related changes in i3 config.

Also added keybind to rename workspaces.
i3status: Move battery to the right; switch to per-cpu temp.
pentadactyl: set hlfind
vim: add vim-signature plugin
zsh: alias for vim changed. corrected fsu alias.
zsh: add cwd-spawn functions; other minor function tweaks.
zsh: don't share history
zsh: temporarily disable dynamic prompts.
zsh: minor modification to startup
zsh: add $EDITOR to zshenv; source functions