Merge branch 'testci' into 'master'

Add .gitlab-ci.yml

See merge request !1

.gitlab-ci.yml

+image: maven:3.5.0-jdk-8
+
+
+
+cache:
+  paths:
+    - .m2/
+
+variables:
+  MAVEN_OPTS: -Dmaven.repo.local=${CI_PROJECT_DIR}/.m2
+  
+  
+
+build:
+  script: "mvn compile -B -T 2"
+
+
+test: 
+  script: "mvn test -B"
+
+deploy:
+  script: 
+    - "mvn package site:site -DperformRelease=true -DcreateChecksum=true -DskipTests=true -B"
+  artifacts: 
+    paths:
+      - target/*jar
+      - target/site/*
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