Remove all references of the window controller from GDBpConnection

Remove all references of the window controller from GDBpConnection

* Source/GDBpConnection.h: Removed the windowController ivar and prop
* Source/GDBpConnection.m:
(initWithWindowController:port:session): Renamed to -[initWithPort:session:]
(dealloc): No more windowController
(socketDidAccept:): Change a -[refreshStatus] to an -[updateStatus]
(reconnect): Don't make a call on windowController
* Source/DebuggerController.m:
(init): Use the updated init method for GDBpConnection