Merge branch 'gitlab-ci' into 'master'

Add gitlab-ci and README

See merge request !5

.gitlab-ci.yml

+variables:
+  DEPS: meson json-glib-tools
+
+before_script:
+  - export DEBIAN_FRONTEND=noninteractive
+  - apt-get -y update
+  - apt-get -y install $DEPS
+
+.tags: &tags
+  tags:
+    - librem5
+
+build:native-debian-bullseye:
+  <<: *tags
+  image: debian:bullseye
+  artifacts:
+    paths:
+      - _build
+  script:
+    - meson --werror . _build
+    - ninja -C _build

README.md

+Device specific feedback themes for Feedbackd
+=============================================
+
+[feedbackd][] provides a DBus daemon (feedbackd) to act on events to provide
+haptic, visual and audio feedback. This repository contains the device
+specific feedback theme files.
+
+## License
+
+Themes are licensed under the GPLv3+.
+
+## Getting the source
+
+```sh
+git clone https://source.puri.sm/Librem5/feedbackd-device-themes
+cd feedbackd-device-themes
+```
+The master branch has the current development version.
+
+## Building
+This validates the contained themes:
+
+```sh
+meson . _build
+ninja -C _build
+```
+
+If you don't want to install the themes you can test a specific theme
+using feedbackd's `FEEDBACK_THEME` environment variable.
+
+[feedbackd]: https://source.puri.sm/Librem5/feedbackd

meson.build

-project('feedbackd-device-themes', 'c',
+project('feedbackd-device-themes',
           version : '0.0.0',
           license : 'LGPLv3+',
     meson_version : '>= 0.49.0',