Changed implementation of gitflow_all_branches() subtly, since "git branch -a" returns remote branches with a "remotes/" prefix. "git branch -r" still returns branch names we are used to.
Changed implementation of gitflow_all_branches() subtly, since "git branch
-a" returns remote branches with a "remotes/" prefix. "git branch -r"
still returns branch names we are used to.

JelteF/gitflow,oddnoc/gitflow,dhilgarth/gitflow,yonglehou/gitflow-1