Remove redundant Clipping in DrawGreatCircle
Reduce cpu overhead due to WideChar conversion of Topology label
  - before, conversion is made each time Label is drawed
  - after, convertion is made only one time when topology is loaded
Add log if bt stack api dll loading failed
changes update for 4.1c
fix bug in XMLNode::CreateXMLStringR(...)

  xml attribut without value need to be <Node Attr="" /> and not <Node Attr />
Hardward ComPort don't work,caused by wrong baudrate setting.
  regression of 43a401f827b977487ec8842bc603e6a3807db3f3
Merge branch 'Changes_update' of git://github.com/AlphaLima/LK8000 into new
Merge branch 'BthLog' of git://github.com/brunotl/LK8000 into new
TESTBENCH only log messages for bthandlerwince
	modified:   BtHandlerWince.cpp