i3/config: Change font setting from pango to xft
i3status: Add USB network info
py3status: Add a net_rate and better mpd_status
zsh: Improve vi mode
vimrc: Disable annoying keys
vim: Remove unused bundles and add CtrlP bundle
Xresources: Change font to inconsolata
vimrc: Add various settings

Make "," the leader key. Use the leader+f for CtrlP. Add other file
opening key bindings. Make sure the status line is always visible. When
reopening a file jump to previous line. Remove auto save feature.
passmenu: Add dmenu script for pass command

Also add some environment settings for the pass command in zsh/zshrc.
i3/config: Bind $mod+p to passmenu