dammit git

just...dammit.
ps2 starter code
added makefile and main.c
added makefile and main.c
such Makefile wow
wrote is_red_black_tree
yayyyyy
Test code

Added a function that creates a red-black tree from a sorted array of the given size and then checks it it was actually a red-black tree.
Create README.md
added comment
merging
Merge branch 'master' of github.com:pochuan/cs166
Merge remote-tracking branch 'origin/master' into fenichel