Pipeline Start Cause - JENKINS-20822
Merge pull request #49 from gusran/master

Pipeline Start Cause - JENKINS-20822
JENKINS-20822 Triggered by is now in header
JENKINS-20822 Added Gustav as developer
JENKINS-21008 JQuery will not submit additional requests to the server if a ongoing request is active
JENKINS-21008 Using Jenkins.getItemMap() instead of Jenkins.getItem() in getUpstreamBuild() to increase performance
JENKINS-20822 Fixed hardcoded strings
Merge branch 'master' into manual-trigger

Conflicts:
	src/main/java/se/diabol/jenkins/pipeline/PipelineFactory.java