Changing last hint to answer + bolding last hint, take 1 (A -> C)
Merge branch 'master' of https://github.com/Khan/khan-exercises
Start integer sum exercise
Working integer sum exercise
Implemented some suggestions
Improved final hint
Remove email field from GitHub issue reports #FIXIT (53 minutes ahead of schedule)

Reviewers: alpert, kamens

Reviewed By: kamens

Differential Revision: http://phabricator.khanacademy.org/D412
. Change square_roots to use sqrt symbol. . Use final_solution class where appropriate. . Minor language tweak. . Reduce size of answer boxes for simplifying_radicals.html

Reviewers: eater

Differential Revision: http://phabricator.khanacademy.org/D416
Merge branch 'master' of https://github.com/Khan/khan-exercises
Removed commented out var
#row37 of exercise fixit
remove the word adjacent from all number line questions

Summary: trival little FIXIT to get thing moving

Test Plan: tested locally with SimpleHTTPServer

Reviewers: emily

Reviewed By: emily

Differential Revision: http://phabricator.khanacademy.org/D418
New problem types for graphing linear equations: horizontal and vertical lines.

Summary:
I added horizontal and vertical lines per https://trello.com/card/graphing-vertical-and-horizontal-lines/4fa477356968b1557b0964ce/134 and https://docs.google.com/a/khanacademy.org/document/d/1eMCv-sO6XKJG5nRNajK-ySHyC9fBquerzuqF6LBsV2w/edit.
I'm sure there are a million and one mistakes. I apologize in advance. If you'd like me to redo the overall exercise inheritance structure, don't hesitate, just learning how to FIXIT.

Test Plan: tested normal, vertical, and horizontal lines, expanding hints, checking right/wrong answers, etc.

Reviewers: eater, emily

Differential Revision: http://phabricator.khanacademy.org/D419
Fix typo in hint -- thanks Jesse
Fixed spacing after comma
Slightly reworded hint, thx Jesse
Another reworded hint, thx Eater
#row19 fix it for quadratics + cleaned up abs value checking
Add a <br /> to exploring_mean_and_median question #FIXIT

Summary:
When MathJax rendered the median at a line break, the MathJax span was
sometimes not visible. When this happens, it will magically appear as soon as
you start poking around in the DOM inspector. Rather than chasing an obscure
MathJax/browser bug, this adds a linebreak to prevent this condition from
happening in the first place.

This also changes the graphie scale to 35 from the default of 40 to fit the
narrower power-mode format on narrow screens.

Reviewers: emily

Reviewed By: emily

Differential Revision: http://phabricator.khanacademy.org/D420
Don't mark graphing_linear_equations wrong until points are moved

Reviewers: kamens

Reviewed By: kamens

Differential Revision: http://phabricator.khanacademy.org/D421