Hi Again

Back again with some fixes rather than new functions.

I’ve tried to add to navmi:
- AppToDate support (see http://www.apptodate.org/get and http://www.modaco.com/content/apptodate/267096/download-apptodate-supported-applications/ for more information)
- some tweaks for power control – especially on HDC WinMo devices.

Thanks again all for the feedback – it all helps to keep making navmi better :)