Remember to cube side lengths
Fix angle mode setting in calculator

Summary:
Due to the way JS files are packaged, it seems that `Calculator` inside the closure was referring to the old calculator object instead of the wrapper we make around it. Just avoid referencing it to avoid any confusion.

Should fix trig functions not working on the live site.

Reviewers: eater

Reviewed By: eater

Differential Revision: http://phabricator.khanacademy.org/D5759
Add shouldPreserveReflexivity option to addMovableAngle.update

Summary:
Adds a `shouldPreserveReflexivity` option to addMovableAngle.update()
If true, the angle's reflexivity (whether it's greater than or less than
180 degrees), will not change on the update. This allows for greater
control over what the point movements before an update() mean.

Test Plan:
Used in the perseus transformer widget, tested in test.html

previously: D5740 (new revision because it has changed so much)

Reviewers: alex

Reviewed By: alex

CC: alpert

Differential Revision: http://phabricator.khanacademy.org/D5793
Make test for perp biscectors on circumcircle
Merge pull request #155285 from petercollingridge/compass2

Make test for perpendicular biscectors on circumcircle exercise
Merge pull request #154511 from petercollingridge/volume2

Remember to cube side lengths
Divert perseus issue reports to JIRA instead of GitHub

Testing out a different platform for issue tracking that will hopefully make it easier to get issue reports directly to content creators. We'll see how this goes.

Test Plan: With the corresponding changes in webapp, report an issue on a khan-exercises problem and a perseus problem. In each case, see that the issue gets created in the appropriate tracker.

Auditors: alex