Prepare for 2.0 release (#47)

* delete example fig file

* move empty example.lua to testfiles

* fix $XDG_CONFIG_HOME handling

it already includes .config, so only add .config to $HOME

* update readme

fix bug with emojis

let was not updating the outer xfont, which was causing a null pointer
dereference later

no longer have to build dwm shared library

delete the last bindgen reference, but not the module yet