Add checkAgreesToSiteToS() (partially implemented until circular import fixed).
Need to fix a circular import problem before the alternate message will
include a link to the site-wide ToS Document.
Also, fixed the descriptions in the first few check...() functions.
Patch by: Todd Larsen
Review by: to-be-reviewed
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