Updates methods section, data table to include the datasets from my database.
Merge remote-tracking branch 'upstream/master'
Add if statement to ask if the tables should be dropped or if data should just be appended to the table.
Updates wins by dataset graph for beetles, spiders, amphibians, fish.
Fixes some errors in the graphing functions.
Fiddles with wins by dataset parameters to improve graph, plus fix graphing error.
Adds beetles by model.
Adds spiders by model.
Adds amphibians and fish.
Changes color for the Zipf distribution.
Merge pull request #74 from embaldridge/master

Graphing code, plus some quick updates to chapter 1