Dev instructions

# Run a test nested X server with dimensions tuned for i3 status bar work
$ Xephyr :1 -screen 1280x200 &
# Run i3 with a custome socket directory so you don't clash with any
# preexisting ones.
# TODO(wathiede): write stripped down i3 config and use it
$ I3SOCK=/tmp/i3 DISPLAY=:1 i3