Make use of decorators.view for all views
This gives us a 'view' hook where we can do things that need to be
done for all views (such as catching certain exceptions, or checking
for maintenance mode).
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