fixed confidence intervals
switched standard deviation calc to something I understand
minor show experiments view, closes #6
Merge branch 'develop' of github.com:seatgeek/sixpack into develop

Conflicts:
	sixpack/models.py
Merge branch 'master' into develop
No longer using z_score from split-rb
clean up some of the error/response handling, refs #2
more cleanup/tests
pep8
initial documention work
Merge branch 'master' of github.com:seatgeek/sixpack