If EXWM is mainly used in line-mode, it is useful to add the
bindings to the list of global prefix keys instead of setting them globally.
This way, they become accessible via the minor mode map, and can also be
deactivated again.

Typos found with codespell.

This prevents Emacs from waiting.

Fixes #2.

Fixes #3.

Most code was extracted from its Emacs configuration.

:group is not needed after a defgroup.