Odyssey 1.23 r5_beta05 - AmigaOS4

-- fixed memory leak in ac_free_video_decoder done by Piru on "acinerella" (FFmpeg wrapper simplifying work with FFmpeg: https://github.com/astoeckel/acinerella/)
-- for time being use back static libavformat.a instead of shared version till proper changes will have a place (that to avoid crashes in ffurl*)
-- debugging: added cross-platform D(bug("...")) define (see Base/debug.h), thus on OS4 always use DebugPrintF() instead of kprintf() and get rid of Clib2's libdebug.a
-- get rid of libaos4deps.a, which contain sttcpy() and DoSuperNew() realisations, those functions now in separate object.
-- updated youtube scripts to the latest ones from Fab's page.
-- get rid of CyberGraphics everywhere in favor of graphics.library (c) Capehill
-- added support of compositing video in fullscreen mode. You can have as many videos in different tabs as you wish in fullscreen, not just one as with overlay (be it P96 or CGX5).
   also fixing some bugs in MediaPlayer while adding compositing video (c) Ami603 with help from Hans & Capehill.