Renamed gender and education demographic table columns.
Disabled Auto-Width for Datatables
Updated Enrollment Filling

- Filling with data from previous day, not next day
- Cloning the original datapoint instead of creating an empty one. (This will be more useful for enrollment tracks)
- Added a separate test for testing the filling algorithm. (Dealing with gaps for all test data is an unnecessary pain)
Displaying Enrollment Mode on Enrollment Activity Page
Merge pull request #179 from edx/dsjen/demographic-table-labels

Renamed gender and education demographic table columns.
Merge pull request #169 from edx/verified-enrollment

Displaying Enrollment Mode on Enrollment Activity Page
Enrollment Mode Tweaks

- If course has multiple enrollment modes, total enrollment will not be displayed in the chart, but will will be available in the table.
- Copy tweaks
Disabling Demographics Acceptance Tests by Default

This feature is gated. The tests must be explicitly enabled on the command line.
Updated education levels to new API format.

* added translation to education levels
* updated education chart and table text