MATH130 Student's Guide to the Chen and Duong Notes for MATH130

I've added a section at the start called "Introduction to Fractions", as well as fleshing out polynomials, and the gradient formula.
 
This should now contain enough stuff to be able to solve Assignment 1 for the 2011 Semester 2 stream of MATH130 (as well as a lot of the other assignments, but some of the earlier stuff was missing).
 
Full list of changes is at: https://github.com/carneeki/Grokking-MATH130/commit/6ab2c30ffd016a28969cab2ed670fa375c5f821c