GitLab

- use constancts from cpp where applicable (instead of hardcoded values)
- removed obsolete comments
- added missing comments with some explanations
- factored out common code in the creation of static classes and types


git-svn-id: svn://bind10.isc.org/svn/bind10/experiments/python-binding@2243 e5f2f494-b856-4b98-b285-d166d9295462