Merge branch 'ci' into 'master'

Add CI

See merge request b0/matrique!2

.gitlab-ci.yml

@@ -3,4 +3,11 @@ image: rabits/qt:5.11-desktop
 build:
   stage: build
   script: 
-    - ls -l
+    - git submodule update --init --recursive
+    - mkdir build && cd build
+    - qmake ../matrique.pro -spec linux-g++ CONFIG+=qtquickcompiler
+    - make -j4
+    
+  artifacts:
+    paths:
+    - build/