Add cumulative network size and people trained
Record cassettes once
Merge pull request #347 from theodi/feature-add-cumulative

Add cumulative network size and people trained
Change location of cumulative network stuff
Add cumulative income metric
Merge pull request #348 from theodi/feature-add-cumulative-income

Add cumulative income
Merge branch 'refs/heads/master' into travisify

Conflicts:
	.travis.yml