Added error views for when data isn't available in the views.
updated summary and trend declarations out of except blocks, added logging for no data states, updated naming of missing data and 404 tests
Removed Hover Effect from Course ID in Main Nav
Moved the data table sort icons next to the column headings.
Merge pull request #126 from edx/dsjen/table-sort-icons

Moved the data table sort icons next to the column headings.
Darkened gray on summary card subtitle.
Merge pull request #128 from edx/dsjen/darker-summary-subtitles

Darkened gray on summary card subtitle.
Fixed 500 Page Template Issues

- Restored settings_value template tag
- Updated debug error views to use the actual Django views
- Updated acceptance tests
Merge pull request #127 from edx/500-fix

Fixed 500 Page Template Issues
fixed broken csv 404 unit test
added test for is_valid_course
Merge pull request #99 from edx/dsjen/notify-incomplete-data

Added error views for when data isn't available in the views.
Renamed pylintrc file