Starting with the upcoming ''preview release'', branches, branch names and tags
will be rearranged to follow the Git-flow pattern instead of the existing
ad-hoc organisation with a release branch.
The documentation provided here defines the actual naming conventions
and some fine points regarding the version number upgrades
and placement of release tags.
Furthermore, two helper-scripts are provided to automate version number updates
- `buildVersion.py` : extract current version from git tag and allow to bump version
- `setVersion` : manipulate all relevant files with `sed` to update the version info
