- Add Claxon FLAC Decoder Plugin.

This element depends of a flacparse before the decoder.

TODO:

• Check and fix audio with 24 bits or no mono
• More defensive programming (delete unwraps and check the flacparse)
• Check all the headers. Read https://xiph.org/flac/format.html
• Add more test.

Tested with:

gst-launch-1.0  -v souphttpsrc location=https://archive.org/download/MLKDream/MLKDream.flac ! queue2 !  flacparse ! claxondec ! autoaudiosink

Fixes #71 (closed)