Compatibility between packages
Looks better, I think.
Merge pull request #92 from eggrobin/monospaced-font-size

Looks better, I think.
Equations from lecture 2013-04-18, some blurbs missing.
Merge pull request #93 from eggrobin/maths

Equations from lecture 2013-04-18, some blurbs missing.
First draft, lots of stuff to be added from handwritten notes.
Fixed a few bugs.
Merge, though we're missing quite a bit from the last lecture.