With current zfec code, fec_init() needs to be called prior to fec_new(),
otherwise the later one returns NULL.
\+ updated submodule to the current zfec version (requiring fec_init();
but UG will compile with the older zfec version as well)
* Added soxr 0.1.3 as an external dependency (for the resampling code)
* Removed resampler quality parameter
* The decklink drift fixing class has been changed to be disabled by default. The help for the decklink has also been updated to include details about the dynamic resampling process.
* Stopped the dynamic resampler spamming the verbose log too much
