Plan:
Week: Action
7: write report of all things done so far.
8: program to incorporate weka in Raindrop & resolve some trivial issues
9: write report on progress, and plan next phase of project
10: implement classification by association mining of from and subject fields
11: write report, and plan for next phase
12-13: do a more sophisticated Machine learning algorithm, using ideas from Topic modeling 
14: complete repor