change in observation attribute names

[Saadmaghani]

a lot of names have been changed. Such as obs.observation["minimap"] to obs.observation["feature_minimap"]. Similarly obs.observation["screen"] to obs.observation["feature_screen"]. Im only starting your tutorial so I dont know of other name changes but Im guessing there are others. The version of pyc2 im using is 2.0.1

Thanks for the great tutorial!