Play with your Tamagotchi

[rafaelhenrique]

Based on class described here:
https://groups.google.com/forum/#!topic/python-sorocaba/w2EvUun-NHQ

• Implement joken po on your Tamagotchi API, send your hand on post, and receive WIN or LOSE from this post
• Implement GET method to know if the Tamagotchi is having fun

[rafaelhenrique]

One PR for this issue is only accepted if have tests and Coverage > 90%.