doc: update badge links

doc: update NEWS

build: bump version to 0.9.4

build: do not use VPATH builds with `make distcheck`

build: include libgladeui in docker image

build: add explicit dependency to coverage on GitLab CI

build: include gcovr in docker image

doc: use GitLab specific badges

build: add GitLab coverage support

build: simplify code integration by using only one stage

build: fix double escaping in GitLab CI

build: fix meson building with pango disabled

build: install git in docker image

build: share autogen.sh results between GitLab CI stages

build: check dist in GitLab CI

build: use artifacts to pass data between GitLab CI stages

build: trying to get how GitLab CI works

build: use custom image for GitLab CI

build: bootstrap GitLab CI naked repository for autotools

build: fix GitLab CI pip3 installation

build: fix GitLab CI preparation

build: include basic GitLab code integration

doc: update ABI laboratory link

build: use `build` forlder in TravisCI

i18n: update italian translations

doc: favor meson over autotools

doc: mention adg-openresty demo project

doc: update and sync installation instructions

build: add space before `;`

build: improve compilation database generation

build: renamed `build/` to `autotools/`

build: fix cleaning with coverage enabled

doc: fix adg-text-internal handling

build: update gtk-doc to latest changes

build: support gobject-introspection < 1.59.1

adg: adg_canvas_export_data()

doc: update README.md

i18n: update italian translations

doc: update copyright line for 2022

build: use -1 and -1.0 suffix consistently