AGJS-205: align with Mozilla SimplePush spec: setMozMessageHandler -> mozSetMessageHandler
AGJS-169: SimplePushClient: call onConnect when using native implementation
UnifiedPushClient - Remove double Encoding from unregister - AGJS-206
UnifiedPush Client - remove trailing slash - AGJS-207
quote travis version so that it get not evaluated to float

https://github.com/travis-ci/travis-ci/issues/2591
using .host instead of .hostname+.port
Merge branch 'pr/141'