Added New Log Type (Packet) For deep-down network debugging. And Added missing case to Client.cpp

I found an additional log type "Packet" useful for myself while creating my ClientAgent, because at one time I was printing out raw packets. (Perhaps I should pull request my datagram.str() as well?). 

Also, Client.cpp was missing the STATESERVER_OBJECT_ENTER_OWNER_WITH_REQUIRED case. This adds that.