Merge pull request #12 from klocey/master

revised 15 July notes file -KL
First attempts at heat map, but stuck at the moment
Simpson Diversity needs to be cleaned up
Changed to include 1 - D
added index of diversity, reciprocal, and evenness
Found problem needs work
Logic problem I think...
Still working on this
Created indices file, added notes, generated heat map
made small revisions to indices codes -KL