remove extra create file line
only add one related build comment per build per issue
updated docs about permissions
link to global configuration page when no sites is set up
[maven-release-plugin] prepare release youtrack-plugin-0.5.6
[maven-release-plugin] prepare for next development iteration
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/main/java/org/jenkinsci/plugins/youtrack/YouTrackSCMListener.java
	src/main/resources/org/jenkinsci/plugins/youtrack/YouTrackProjectProperty/config.jelly
	src/test/java/org/jenkinsci/plugins/youtrack/YouTrackSCMListenerTest.java