Move GLES20 source into standard locations
Move Khronos headers into their respective components, to be exported by each.
Remove hostthreadadapter as nothing outside of the vghwapiwrapper, which now contains the code, needs it
#ifndef _MCIAVI_H
#define _MCIAVI_H
#if __GNUC__ >=3
#pragma GCC system_header
#endif
#define MCI_MCIAVI_PLAY_WINDOW 0x1000000
#define MCI_MCIAVI_PLAY_FULLSCREEN 0x2000000
#define MCI_MCIAVI_PLAY_FULLBY2 0x4000000
#define MCI_AVI_STATUS_FRAMES_SKIPPED 0x8001
#define MCI_AVI_STATUS_LAST_PLAY_SPEED 0x8002
#define MCI_AVI_STATUS_AUDIO_BREAKS 0x8003
#define MCI_AVI_SETVIDEO_DRAW_PROCEDURE 0x8000
#define MCI_AVI_SETVIDEO_PALETTE_COLOR 0x8100
#define MCI_AVI_SETVIDEO_PALETTE_HALFTONE 0x0000FFFF
#define MCIERR_AVI_OLDAVIFORMAT (MCIERR_CUSTOM_DRIVER_BASE+100)
#define MCIERR_AVI_NOTINTERLEAVED (MCIERR_CUSTOM_DRIVER_BASE+101)
#define MCIERR_AVI_NODISPDIB (MCIERR_CUSTOM_DRIVER_BASE+102)
#define MCIERR_AVI_CANTPLAYFULLSCREEN (MCIERR_CUSTOM_DRIVER_BASE+103)
#define MCIERR_AVI_TOOBIGFORVGA (MCIERR_CUSTOM_DRIVER_BASE+104)
#define MCIERR_AVI_NOCOMPRESSOR (MCIERR_CUSTOM_DRIVER_BASE+105)
#define MCIERR_AVI_DISPLAYERROR (MCIERR_CUSTOM_DRIVER_BASE+106)
#define MCIERR_AVI_AUDIOERROR (MCIERR_CUSTOM_DRIVER_BASE+107)
#define MCIERR_AVI_BADPALETTE (MCIERR_CUSTOM_DRIVER_BASE+108)
#endif