implementation and test of :
sendPrintRing
SendUpdateSuccessor
SendUpdatePredecessor
correction of typo
adding new message type
comments and changes due to refactoring, moar changes incoming
first throw web sprint prevision
refactoring of communicator lib organization
light modification of message type : more lisibility when debugging
changing how to access to shared logger
changings related to refactoring of communicator
communicatorUtil regroupe shared things between receiver and sender
using log for nodeInfo and others
modification of logger access and format
making :
-node.IsResponsible
- node .FindClosestNode

now public
adding receiver part
rename sender part and reduce the test ( they are gone to communicatorUtil_test )
update successor/predecessor are now public
print Ring changes
lookup waiting for response or timeout
printRing changes
parts for communication goes to communicatorUtils