Create/update tags and branches due to new development model

[malex984]

• More detailed commit messages: Short one line description + empty line + detailed description
• Branches: master, devel, feature/branch_name, hotfix/branch_name, release/semantic_version
• For initial development: v.0.major.minor.patch (major.minor.patch like SemVer)
• Create new branch if code review seems necessary; once finished open pull request into devel; review code; automated test?, merge/reject
• Close issue with wontfix or with commit (https://help.github.com/articles/closing-issues-via-commit-messages/)

[malex984]

IMO this is not yet done with the creation of release tags since current master is way behind...

[malex984]

Fixed wrong release tag.

[malex984]

Also removed POCDemo in favor of v0.0.1