Add key icons

Closes #44

See merge request Librem5/squeekboard!65

Remove unused XML from the US definitions

See merge request Librem5/squeekboard!64

Resolve "Period should not change when caps lock is active"

Closes #27

See merge request Librem5/squeekboard!63

Reduce icon size to match platform guidelines

See merge request Librem5/squeekboard!62

Simplify geometry XML

See merge request Librem5/squeekboard!61

Include extra space in the window object

Closes #47

See merge request Librem5/squeekboard!60

Remove pop-ups for pressed keys

See merge request Librem5/squeekboard!59

Fix clipping issue at bottom of keyboard

Closes #47

See merge request Librem5/squeekboard!58

Closes #47.

Basic functioning views

See merge request Librem5/squeekboard!57

Improve view behavior to more closely reflect #38

See merge request Librem5/squeekboard!55

Copyright

See merge request Librem5/squeekboard!6

Simplify icon rendering a bit

See merge request Librem5/squeekboard!52

Instead of doing scale guessing we know that we get a properly
sized image from GTK+ so just scale it down a bit so it gets
some border within the drawing area.

MERGE these: Some bugfixes - the buildsystem is acting up again

See merge request Librem5/squeekboard!53

FINAL: bundle xml resources, allows running uninstalled from git repo

Closes #29 and #21

See merge request Librem5/squeekboard!49

gitlab-ci: No need for our ci repository

See merge request Librem5/squeekboard!54

Just using debian buster makes things more stable.

This let's us drop the virtboard build dependency.

This allows running uninstalled from a git repo

Closes: #21, #29