Framework for interaction answer views calculations

[GoogleCodeExporter]

Branch name:
widget_answer_views2

Link to the relevant commit(s):
https://code.google.com/p/oppia/source/detail?r=95bf86855068d6328d46632777def4fd
44503376&name=widget_answer_views2

Purpose of code changes on this branch:
Framework for interaction answer views calculations

When reviewing my code changes, please focus on:
Do all data structures make sense, especially the split between domain level 
and data store level. The code is not finished yet, and there is only one test 
that can be run like this:

python core/tests/gae_suite.py 
--test_target='extensions.interaction_answer_view_calculations.calculations_test
.InteractionAnswerViewCalculationsTest'

The next step should be to do the calculations with map reduce and the job 
submission system instead of the 'manual' calculations used at the moment.

After the review, I'll merge this branch into: develop

Original issue reported on code.google.com by mschmittfull@gmail.com on 4 Mar 2015 at 3:10

[GoogleCodeExporter]

As discussed, holding off on reviewing for now until a clean commit is 
submitted (this one seems to include a merge error).

Original comment by s...@seanlip.org on 4 Mar 2015 at 10:37

• Changed state: WontFix