* build for 10.5+

Conflicts:

	ultragrid/src/video_compress/fastdxt.c

* compression (DVS10)
* DeckLink - play also DVS10

replaced with ':', eg. -t testcard:1920:1080:30:UYVY

* check it only at runtime
+ minor fixes (JACK, testcard2)

there is still problem with decoder, TODO revide it, but works by now
+ little GL fixes

* expect localhost where not set
* TODO: revide iHDTV (remained untouched by this change)
+ minor changes in yuv422->yuv444 shader

* fixes #0000145, #0000146

* TODO: figure it out on Mac X OS, add deinterlace shader and maybe
  other shaders for decoding other codecs (v210 etc.)

Conflicts:
	dxt_compress/dxt_common.h
	dxt_compress/dxt_decoder.c
	dxt_compress/dxt_display.c
	dxt_compress/dxt_encoder.c
	dxt_compress/main.c