Add most recent Python versions in Travis CI (#371)
Add most recent Python versions in Travis CI (#371)

* Add most recent Python versions in Travis CI

Add more recent Python versions including development branches and nightly build.

* Remove dev and nightly from Travis versions

femtotrader/pyfolio,femtotrader/pyfolio,quantopian/pyfolio,quantopian/pyfolio,chayapan/pyfolio