Green tests
Update README.md
Add mavlink docs
Add docs to gpio package
Fix broken tests
Add sphero docs
Adding doc.go to sphero package
Correct indentation for doc.go in sphero package
Adding doc.go to gpio package
Merge branch 'dev' of github.com:hybridgroup/gobot into api-docs

* 'dev' of github.com:hybridgroup/gobot:
  Adding doc.go to gpio package
  Correct indentation for doc.go in sphero package
  Adding doc.go to sphero package
  Add sphero docs
  Fix broken tests
  Add docs to gpio package
  Add mavlink docs
  Update README.md
  Green tests