More clearly explain multibranch implementations
More clearly explain multibranch implementations

MarkEWaite/git-plugin,MarkEWaite/git-plugin,jenkinsci/git-plugin,martinda/git-plugin,jenkinsci/git-plugin,martinda/git-plugin,MarkEWaite/git-plugin,jenkinsci/git-plugin,MarkEWaite/git-plugin,martinda/git-plugin,jenkinsci/git-plugin