Added a checkHasDocumentAccess method
Uses the SCOPE_DEPTH to determine how far to walk up the scope so
that the correct value for scope_path is set.
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