add simple opengl program
more legacy code removal
add diffuse lighting
Merge branch 'master' of https://github.com/aosabook/500lines
finish lighting tutorials
Merge remote-tracking branch 'upstream/master'
refactoring into separate files
make html page the default
closer to blocks actually doing something
Merge branch 'master' of https://github.com/aosabook/500lines
basic turtle drawing blocks are working
can position blocks in the script now
looping works
Merge branch 'master' of https://github.com/aosabook/500lines
refactored for script building
load and save is working
First tiny bits of data-store.
commend out define block
Fleshing out the binary tree. Read/insert only for now.
Rewrites the binary tree in terms of the tree container and nodes. Definitely cleaner.