Fixed basic Survey access check.
Also enabled this check for all relevant Views. However ProjectSurveys and subclasses still need an additional check. A stub for this has been added to the access module.
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