add retry mechanism on ping method
fix pyflakes verification command
clean and rename ClientManager and RobotManager classes
remove xmpp module
remove unused parse_args and add timeout decorator
create xmpp package
big changes in RPC mechanism with RPCRequest and RPCResponse messages
test proxy_robot
fix bad import
Merge branch 'master' of github.com:SalemHarrache/robair-ros-pkg