- to be able to test A/V sync
- TODO: figure out performance - 30p is feasible only on quite good CPU
  - consider removing rbg2yuv for every frame (but the picture will have
    to be more static then)

* added SDL audio, ring buffer abstraction
* fixed JACK receiving
* many other bugfixes (mainly audio)

* eg. fail when FastDXT isn't compiled but compression is required

* TODO: do the same for SDL - but there must be figured out parameters'
  parsing, which is now rather complex

* do not try to find appropriate format in case that the required
  format was entered manually

* force 32 binaries build under Mac
* drop GLEW requirement (TODO: check if we really do not need it,
  except for OGL < 2.0, which is slightly outdated)

* TODO: check on newer Mac X OS (was tested with 10.5) - AudioComponent
  API has changed

* DVS driver - wrong directory check - driver build failed
  even if current kernel headers are present (at least under Debian)
* perf - dispose shared memory (TODO: dispose also with UG)
* DVS - send FPS (was missing)
* compress - fixed flag read

* ship libraries according to portaudio.in
* another small fixes (see log)

* TODO: check pathological states (eg. audio buffers overrun etc.)

+ minor audio refactoring

* build - linker g++ for FastDXT
        - do not require Xext
* portaudio fix - work even if there is no sound card

* fixed DeckLink driver build on recent kernels (~3.0)
* fixed build on CentOS (omitted libraries)

* fixed wrong destriptor set (UDP)
* SDL - read display resolution only on first time

Conflicts:
	ultragrid/src/main.c
	ultragrid/src/video_capture/dvs.c
	ultragrid/src/video_capture/dvs.h

+ SDI audio currently for quad, decklink and testcard only
+ some other fixes (see log)

Operators '<<' and '>>' have quite a low precedence so using it
unenquoted can cause problems in some expressions.

+ auto(re)configuration

* some fix included in order to compile on newer kernels (driver)
* thanks to Milos Liska

Other changes:
* added dependency on SDL for testcard
* TODO: consider more cleanups (removing all X checks from
  configure.ac etc.)
* dropped check for GLU (no longer needed)

* minor code cleanup in QT