add travis
Merge branch 'master' into develop

* master:
  add travis
Merge branch 'develop'

* develop:
Merge branch 'master' into develop

* master:
version bump
Merge branch 'master' into develop
Merge branch 'develop'

* develop:
update travis config
Merge branch 'develop'

* develop:
  update travis config
add travis badge to readme
Merge branch 'develop'

* develop:
  add travis badge to readme
update readme
Merge branch 'develop'

* develop:
  update readme
add coveralls.io
Merge branch 'develop'

* develop:
  add coveralls.io
add badges for coveralls.io and david-dm.org/
Merge branch 'develop'

* develop:
  add badges for coveralls.io and david-dm.org/
use spec runner
update readme
Merge branch 'develop'

* develop:
  use spec runner update readme
update readme