Voice intents

Implemented the intents classes to analyse the data received from the voice API
Communicate with wit.ai, receive a response, deserialize it, extract the data from it and direct the manual command to the right ninja block.

You can now :
- Set ninja eyes color to all of the basic color you could think of. Say "set ninja eyes to $color".
- Turn on/off the Watts Clever plugs. Say "Turn on/off plug $id", id being 1, 2 or 3, which is the ID of the channel used.
You can also "Turn on/off plugs in kitchen" or "Turn on/off plugs in living room". Kitchen is plug ID 2 and 3. Living room is plug ID 1.