Added the expression trees steps in 06-trees
Upgraded to GraphViz 2.36, which caused the slides/graphs/*.svg images to change slighly
Added the svg versions of the red-black insertion diagrams, which are the same as in my wikipedia repo
Added the lab 5 AVL tree worksheet (including LaTeX source) to the repo
Final updates to lab 5
Finalized the make tutorial
Updated the tree graphs to make the nodes circular
Hopefully finished the 06-trees.html slide set (all the images display correctly at the target resolution
Spelling mistakes
Updated the daily announcements for tomorrow