Add travis tests for python versions 3.4-3.6
Add travis tests for python versions 3.4-3.6

Dark5ide/mycroft-core,MycroftAI/mycroft-core,linuxipho/mycroft-core,forslund/mycroft-core,Dark5ide/mycroft-core,forslund/mycroft-core,MycroftAI/mycroft-core,linuxipho/mycroft-core