Added support for Sensor Data Streaming in shpero driver
Exposed collision detection configuration.
Update travis build script

Update .travis.yml
Merge branch 'dev' of github.com:hybridgroup/gobot
Bump version to 0.8
Merge remote-tracking branch 'krylovsk/master' into sphero_enhancements

Conflicts:
	platforms/sphero/sphero_driver.go
Merge remote-tracking branch 'ardan-bkennedy/master' into sphero_enhancements

Conflicts:
	platforms/sphero/sphero_driver.go
Slight refactor and add default config constructors
Add SetDataStreaming tests
Merge pull request #168 from hybridgroup/sphero_enhancements

Sphero enhancements
Merge branch 'dev'