adding test in ruby
updating travis to latest android sdk tools
 Merge branch 'master' of https://github.com/DominikDary/selendroid into server-standalone
Update .travis.yml

Reverting Changes
 Merge branch 'master' of https://github.com/DominikDary/selendroid into server-standalone
test session creation is able to start emulator, create server apk, install everything and create as well the session on the device.