NxWM: Beginning integration of NxPlayer into Nxwm::MediaPlayer. Gets handle, sets device, and releases handle.  Lots more to be done

SAMA5D4-EK NSH:  Enable the command line media player in the NSH configuration as well (still does not work, however).

SAMA5D3/4: All configurations.  I suspect a MMC/SD multi-block DMA transfer issue.  So for name, this feature is disabled in all configurations

Rename pcm_decode.h to pcm.h since it will hold more than just decoding definitions.  Fix some porting errors like idbg should auddbg, etc.  Add wav file header and a few low-level wav utilities.

Add new framework for the PCM decoder.  It is now a 'front end' for lower-level drivers like the WM8904 that performs the PCM decoding from end

Make sure that all sim configurations have CONFIG_SIM_M32 undefined.  That is probably the wrong default setting, but we need to be consistent above all

SAMA5D4-EK NxWM Configuration:  Increase number of preallocated watchdogs and don't save child status (it is not being reaped)

NxWM: Increase default priority of mouse and keyboard listener threads. Does not seem to make any difference but still seems like a good idea

NxWidgets::CGlyphSliderHorizontal: No longer uses a hard-coded slider height; the slider height is now provided as a parameter, replacing the widget height which is now calculated from the glip image height

Rename CONFIG_NX_MOUSE to CONFIG_NX_INPUT, then add CONFIG_NX_XYINPUT_MOUSE and CONFIG_XYINPUT_TOUCHSCREEN

NxWM::CMediaPlayer:  Fix of state related bugs + Size if CLabel is increased (in preparation for becoming a CListBox)

SAMA5 LCDC: Back out the delay kludge.  Increase the LCDC input clock from MCK to 2*MCK was sufficient for all timing instbility problems