Adding CI

.gitlab-ci.yml

+image: maven:3.3.9-jdk8
+
+variables:
+  # This will supress any download for dependencies and plugins or upload messages which would clutter the console log.
+  # `showDateTime` will show the passed time in milliseconds. You need to specify `--batch-mode` to make this work.
+  MAVEN_OPTS: "-Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN -Dorg.slf4j.simpleLogger.showDateTime=true -Djava.awt.headless=true"
+  # As of Maven 3.3.0 instead of this you may define these options in `.mvn/maven.config` so the same config is used
+  # when running from the command line.
+  # `installAtEnd` and `deployAtEnd`are only effective with recent version of the corresponding plugins.
+  MAVEN_CLI_OPTS: "--batch-mode --errors --fail-at-end --show-version -DinstallAtEnd=true -DdeployAtEnd=true"
+
+stages:
+ - compile
+ - deploy
+
+site:
+  stage: compile
+  script:
+    - mvn -Dgit-rev="`git describe`" $MAVEN_CLI_OPTS site
+  artifacts:
+    paths:
+      - target
+
+pages:
+  stage: deploy
+  dependencies:
+    - site
+  script:
+    - unzip target/*-site.jar -d target/site
+    - mvn -Dgit-rev="`git describe`" $MAVEN_CLI_OPTS site:stage
+    - mv target/staging public
+  artifacts:
+    paths:
+    - public
+  only:
+    - master