Update README.md
added tests from benmachine mathmo repo
added .editorconfig
Fixed link to D3.js in the About box on Mathmo.
MWE of unit tests.
Updated README.
First draft of working unit tests.
<ul> and Newton Raphsom tweaks
added missing initial < in makeMatrix2 expected answer
tweaked formatting of mathmo problems

* Fixed spacing around vectors and matrices
* Defined "exercise" and "subexercise" classes in CSS for list environments
* Fixed spacing in some maths environments
* Fixed typo in Newton-Raphson
* Upright ‘d’s in differential equations
* Moved 2nd order ODEs to Differential Equations section

Unit tests have been updated appropriately.
tweaked formatting of README
fixed capitalisation of LiveScript in readme
switched to pmatrix for vector equations
added equations of lines question

I’ve added the first of vrn20’s questions; specifically:

> Find the equation of the line that passes through the points ... and ....

This commit also adds the appropriate unit tests and config files. The rest of the questions will be added as a series of new commits.
including a helper function necessary for previous commit
Tidied up some edge cases for makeLinesEq
Merge pull request #20 from alexwlchan/master

Minor changes, and the first of the new functions
better formatting of makeLinesEq answer

Two minor changes to lines in the form ax+by+c=0:

* Common factors of a, b and c are divided away so that the equation is in the lowest terms
* The coefficient of y is always positive
* Slightly cleaner code
added equation of circle questions

This commit adds questions of the form “Find the equation of the circle with centre ... and radius ....” and “Find the centre and radius of the circle with equation ...”. It includes the unit tests.

It also adds a new helper file: geometry.js. Currently this includes functions that take the centre and radius of a circle, and return the equation in the form (x-a)^2+(y-b)^2=r^2 or x^2-2ax+y^2-2bx=C.
added new helper function to geometry.js

I’ve added a function to geometry.js, lineEq1, which takes two points (a,b) and (c,d) and returns the LaTeX form of the equation ax+by+c=0 (note the reversed x and y).

If you have an equation in the form y=mx+c, you can get the other form by taking x=0 and x=1.