Update MR links to use the project internal IDs, which are used in the latest versions of GitLab
Add ability to set message for unstable builds
Merge pull request #34 from mjdetullio/feature/unstable-msg

Add ability to set message for unstable builds
Merge pull request #33 from mjdetullio/feature/iid

Update MR links to use the project internal IDs
Fixed README.md about Branch Specifier.
Updating README to mention plugin presence on Jenkins Repository
Merge pull request #42 from fe-lix-/master

Updating README to mention plugin presence on Jenkins Repository
save request -> commit ID mapping
remove xml load and save
Merge pull request #44 from feiyuw/master

Save "request id" and "Commit ID" mapping, and use this mapping to determine run or not
Merge pull request #40 from tototoshi/feature/fix-readme-about-branch-specifier

Fixed README.md about Branch Specifier.
Merge remote-tracking branch 'upstream/master' into forked-merge-requests

Conflicts:
	README.md
	src/main/java/org/jenkinsci/plugins/gitlab/GitlabBuildTrigger.java
	src/main/java/org/jenkinsci/plugins/gitlab/GitlabBuilds.java
	src/main/java/org/jenkinsci/plugins/gitlab/GitlabCause.java
	src/main/java/org/jenkinsci/plugins/gitlab/GitlabMergeRequestWrapper.java