CGRU Version 2.3.0 Released.

[timurhai]

http://cgru.info/changes_log#release230

- Generally new Branch class appeared: http://cgru.info/afanasy/branch.
Now jobs solving is going within branches hierarchy.
Branches can represent departments/projects/assets and you can vary their priorities.
- Task progress change timeout - job block parameter.
- Task minimum run time - job block parameter.
- Numeric pattern frame number replacement is processed in a Python service class.
- Bug fixes.