Changes

Promote ALAudioSink from JOGL to JOAL (Common av classes reside in GlueGen, see gluegen commit 270172bcbd91f96d4a38a3d73e23d744f57a25b8)

JoalVersion: Accept null ALC instance

OpenALTest: Drop nonsense LOOPING test on buffer (only applies to a source)

Manual Demos: Add two simple sine wave synthesizer, Synth02AL may be enhanced to a general synth solution

ALAudioSink: Add exclusive locking allowing less context management overhead

ALAudioSink.dequeueBuffer(): wait == true: Fix sleep cycle and use sleep(1) if slept long enough but giving better threading perf for openal-soft

This with exclusive context gives us no distortion at 3x 12ms frames,
reduced from 3x 16ms. See Synth02AL.

ALAudioSink.toString(): Show hasALC_thread_local_context value ('tlc')

make/scripts/tests.sh: Adjust D_ARGS and add X_ARGS for optional FlightRecorder

ALAudioSink: Enhance using AL_EXT_MCFORMATS (max channels == 8), AL_EXT_FLOAT32, AL_EXT_DOUBLE

Note: AL_SOFT_buffer_samples is n/a since openal-soft 1.18.0

ALHelpers.getALFormat(..) uses cached booleans for optionally used available extensions.

Add DEBUG output for ALAudioSink.init() and ALAudioSink.isSupported(),
allowing to track supported and used formats.

README/index.html: Update Web resources & URLs, add details about audio-backens per platform and contained openal-soft library

Synth02AL: Fix API doc re reduces latency

ALAudioSink: Promote to public, be fully functional regarding AudioFormat and OpenAL paremeter. Can be 'plugged' into existing OpenAL logic.

Doc, scripsts/tests.sh: Mentione OpenAL-Soft environment variables

ALAudioSink: Don'e check errors before context; Track method of context-locking and release same way; Destroy shall also release context.

Result is 'ALSOFT(WW)' free.

Sound3D: Make all OO wrapper fully transparent and stand-alone, allow mix-and-match; Align Context makeCurrent/release w/ ALAudioSink ...

Align Context makeCurrent/release w/ ALAudioSink
- use ALC_EXT_thread_local_context if available
- use a recursive lock
- same release method as makeCurrent
  - ALC_EXT_thread_local_context or traditional
- destroy also releases the context and fully unwinds lock

Sound3D/Context: Use same base ctor to initialize `hasALC_thread_local_context`, benefitting from thread-local-context

ALAudioSink.lockContext(): Only check error state if AL makeContextCurrent()/alcSetThreadContext() fails (returns false)

JoalVersion: List all devices, output devices w/ latency and source count (mono, stereo) using undocumented queries

ALAudioSink: Query latency and re-create context @ init w/ latency (refresh-rate) if frameDuration < defaultLatency

Demos OpenALTest/Synth02AL: Show JoalVersion

JoalVersion: Cleanup dead branches

ALAudioSink: Add getSourceCount() and cleanup error handling and initImpl() locking and exit.

initImpl() shall just return false, not throwing an exception.

Synth02ALL Use float32 (native openal-soft format) if available

README.{txt -> md) and update text incl. license

ALAudioSink.toString(): Allow null==chosenFormat (pre init string representation)

Synth02AL: Use ALAudioSink's default latency instead of fixed frameDuration, using actual OpenAL frame processing refresh value

Also pre-allocate sampleBuffer to 30ms actual format, using AudioFormat.getDurationsByteSize(..)

build.xml: Fix 7z archive: README.{txt -> md}