Better debug messages, minor logic fixes. Work in progress.

src/e-server:
	* src/GdbServer.cpp (GdbServer::rspServer): Make debug depend on
	TranDetail.
	(GdbServer::rspReportException): Consistent debug message format.
	(GdbServer::rspContinue): Use TargetSignal for exceptions.
	(GdbServer::targetResume): Coding error - only print warning
	message if write fails.
	(GdbServer::rspSuspend): Use TargetSignal for exceptions.
	(GdbServer::rspReadMem): Make timing depend on debugTiming flag.
	(GdbServer::targetHalt): Minor grammar fix in debug message,
	fuller error message, improved logic on retry.
	(GdbServer::isCoreHalted): Add commented out test logic pro tem.
	* src/GdbServer.h: Pass signals as TargetSignal.
	* src/ServerInfo.cpp (ServerInfo::debugHwDetail): New functions
	for debugTiming flag.
	(ServerInfo::debugTiming): Created.
	* src/ServerInfo.h: Add new DebugTiming
	* src/TargetControlHardware.cpp (TargetControlHardware::readMem):
	Fuller debug message.
	(TargetControlHardware::writeMem): Likewise.
	* src/main.cpp (usage_full): Add new debugTiming flag.
	(main): Likewise.