Changing last hint to answer + bolding last hint, take 1 (A -> C)
Merge branch 'master' of https://github.com/Khan/khan-exercises
Add area_1 exercise and refactor area_of_squares_and_rectangles to be less algebra-y
Change addition to multiplication in area_of_squares_and_rectangles
Factor out and document odd-shape-generating code
Add support for mode string when sending up params to /attempt.
Merge branch 'master' into power-mode-rewards
Adding support for controlling problem type and seed in the UserExercise object.

Test Plan: Tested locally.

Reviewers: david, eater

Differential Revision: http://phabricator.khanacademy.org/D271
Fix from phabricator review D271.
Oops. Moved variable initialization to before userExercise is set.
I'm tired. :(
minor changes hoping to reduce mistakes
minor changes hoping to reduce mistakes
for some reason this didn't take before
minor fix, now takes -<variable> instead of -1<variable>
Potatoes don't grow in trees
Like the main repo, use linebreaks for KAthJax JS

Debugging errors is much easier when line number errors don't give you
multi-thousand-character lines... (We'll pay a 700-byte size penalty
after gzipping.)
changed from exact answer to inexact
changed from exact answer to inexact
Merge pull request #24770 from Christi/degrees_to_radians

changed from exact answer to inexact