Merge pull request #13 from atucker/master

merging work so far
put back some stuff that someone must have deleted, explored average word length
saving progress
saving progress on numerical models
latest progress
numerical model builder progress
Eli work so far
Merge branch 'master' into john

Conflicts:
	Process Book.ipynb
Merge branch 'john' of https://github.com/atucker/cs109

Conflicts:
	Process Book.ipynb