Canvascli

Added
- Show mean and median grade in plot.
- Add selection to show raw percentage in the plot.
- Visualize unposted student grades.
- Improve warning message for students with an unposted grade
that would change their final grade.
- Allow filtering courses by date
and only show last year's courses by default.
- Print version number and check for the latest version online.

Changed
- The grade drop threshold now applies to the unposted score.
rather than the posted score.
- Make output notes and warnings stand out more.

Fixed
- Make end note easier to read.
- Provide a default value instead of crashing when a course is missing a name.

Added
- Warn when there are unposted canvas assignment.

Fixed
- Remove suffix number in session since this is not used in the FSC.
- Change to a more suitable number of histogram bins.

Added
- Support for the Canvas override final grade column.

Added
- canvascli is now on PyPI!
- More readable visualizations.

Added
- Round grades to integers.
- Cap grades at 100.
- Optional overrides of detected course info.

Changed
- Abbreviate options flags.

Fixed
- Raise useful message upon unauthorized course access.