additional courseware view optimizations. Do a 'depth' fetch on the sele...

Cast cursor responses as lists.  MySQL returns them as tuples.

Removed print statemetns
Moved import call to top of file

Provide convenience converter of the grading policy but don't save it on

the object.

move call to update_templates on service startup into a django-admin com...

Fix for script tags w/in json objects being oddly evaluated on html page

don't make caller responsible.

Fix/will/cs191 matrix style bug

It's not UTC time, it's whatever the local settings are set to 

additional courseware view optimizations. Do a 'depth' fetch on the selected section so that it does a more efficient set of queries to the database. Also, in the CachingDescriptorSystem, if we have a 'cache miss', when we do the actual fetch (which creates a new 'system'), keep that fetched data around in our own collection, in case it is queried again

Feature/jkarni/foldit api

Record and report submission history for a problem

Tell user that spaces aren't allowed in usernames (requested by Teppo).

add performance optimizations (efficiently get all course content) to instructor dashboard

but fetch async via json get.

add depth parameters when loading course and student-state caches. This ...

definition not being updated when using defaults. Not sure why this
passed before.

add depth parameters when loading course and student-state caches. This will make fewer (but fatter) queries to the database

Fix/ned/clean ups

Feature/kevin/cohorts take 3

Merge branch 'master' of github.com:MITx/mitx into feature/cdodge/make-update-templates-django-admin-util

studio - alerts: refactored styles for common content types across UI, got prompts set up and styled, and refactored base template for future prompt/notification/alert use