Add Gedis interface to the robot

[zaibon]

In prevision of the integration of the 0-robot into the 3bot/digital-me framework it would be nice we add the gedis interface to the robot.

Gedis interface is supposed to be:

• faster: it use plain tcp soket
• use smaller bandwidth : data is binary encoded
• provide automatic generation of client code

To check, It would be nice to have a bi-directional connection between 2 robots. This would be used for even propagation between robot so we can avoid having to constantly pool from the receiving side

Todo:

• [x] investigate gedis framework in digital me
• [x] convert the REST API object to digital me schema
• [x] Implement all API handler as gedis actors
• [x] add logic to start the gedis server next to the REST API
• [x] Adapt client code so it can choose which interface to use

[zaibon]

Code complete and test written. But some recent change in gedis code broke my code. I will park this until gedis is stable again. No point running after something that is still moving that much