Fixes issue #102 by closing iframe tags properly.
Merge pull request #103 from oseppala/master

This should fix uservoice and page footers on courses using plugins.
Fixed the problem with the "when" kwargs that had datetime.now() as default value falsely.
Merge commit 'be51caf4a7af3a764684c82da53442762fae04ef'
Merge pull request #104 from Rubinous/master

Fixing the problem with datetime.now() in kwargs
PEP8
Asterisk imports are bad!
Merge pull request #105 from Rubinous/some_small_commits

PEP8 and docstrings - nothing that should affect to the functionality
Merge branch 'master' into faster_summaries
I wrote some general documentation about the design of the UserCourseSummary.