Minor cleaning.
Fix player removal.
Add functions to list players and robots from the proxy.
Fix log name for test_agent_proxy.
Add test for robots and players listing.
Clean interfaces.
Use GMock (and GTest as a dependency).
Use more recent version of messages.
Add packages for GMock.
GTest needs to be compiled.
Add callback to register robot.
Try to make Travis happy based on Massimo's hints.
Fix Hello logic to comply with previous changes.
Add video address and video port in Welcome message.
Use more recent version of Messages.
Add test for robot registration.
Merge remote-tracking branch 'orwell/master' into feature/register_robot
Use official Messages from orwell-int.
Merge commit '010c1ea' into HEAD
Merge pull request #63 from dchilot/feature/register_robot

Feature/register robot