Added grouping support to all forms, converted role as example
Any field that has the 'group' property set be placed in the
specified group. If no such proprty is set, the 'General' group will
be used instead.
Patch by: Sverre Rabbelier
Coverage: code coverage testing for Python
Coverage.py is a Python module that measures code coverage during test execution.
It uses the code analysis tools and tracing hooks provided in the Python standard
library to determine which lines are executable, and which have been executed.
For more information, see http://nedbatchelder.com/code/modules/coverage.html