set-git-properties goal should provide the GIT info as Maven property

[rhierlmeier]

Current there is no possibility to get the information about branchType and and branchName from the
gitflow-helper-maven-plugin.

Introduce a new goal set-git-properties . This goal sets the following Maven properties:

• branchType: Type of the Git-Branch (feature/bugfix/develop/master)
• branchName: Name of the Git-Branch

[rhierlmeier]

I tested the set-git-properties manually and it works quit good (with the changes of #135).
Please merge this PR. Afterwards we can close this issue.

Any plans for a release?