implement urgency hints for xwayland clients

fix segfault when dragging chromium tabs

Run focusclient when switching to monocle layout

remove trailing whitespaces

add `-v` flag to the manpage

Thanks @Humm42

add flag to print version and exit

Merge pull request #230 from BenJarg/null-wlr_seat_get_keyboard

Handle 'wlr_seat_get_keyboard' possibly returning null.

Handle 'wlr_seat_get_keyboard' possibly returning null.

restack xwayland surface on focusclient()

Run printstatus() when a monitor is removed

use pointer math in xytonode()

abc

typedefs: abc

includes: abc

Remove vestigial monitor configuration info

The x/y fields in monitor rules are unused and were meant to be deleted.
Also removes the outdated comment in config.h.

die on pipe failure

Layer shell: Prevent infinte configure/commit loop

Check the wlr_layer_surface_v1_state.committed bitmask to see if we need
to rearrange. This is also what sway does.

Without this check, every commit request (even if only the attached buffer
changed) will lead to another configure event, which will lead to another
commit, etc.

This loop results in swaybg consuming 100% CPU.

Co-authored-by: Owen Rafferty <owen@owenrafferty.com>

new functions ecalloc() and die()

die() replaces EBARF and BARF
and allow us to add `-pedantic` to CFLAGS

check `m` in commitlayersurfacenotify()

implement input-inhibitor protocol