5.0.0: Long-overdue maintenance release

This release fixes a few long-standing bugs in SphinxTrain and makes the package (hopefully) easier to use. Among other things:

• The dependency on SphinxBase is gone, because SphinxBase is gone
• The dependency on Sphinx3 for VTLN and force-alignment is gone (sphinx3_align is included)
• Multi-CPU training actually works, tested on up to 64 CPUs with LibriSpeech, much easier than setting up PBS on the Clown
• The dependency on Visual Studio for buliding on Windows is gone (but please just use WSL, please)
• The dependency on Autotools is gone (CMake ain't great but it's much less bad)
• There is a Dockerfile now
• There is "continuous integration" now (sort of)
• The -remove_silence option has been disabled by default (unlike in PocketSphinx you can still turn it on if you really want to, it might save you a bit of time in training)
• It is not necessary to install SphinxTrain system-wide to run training
• G2P support has been updated for the most commonly installed version of OpenFST (do not try to use any other version, because C++, that's why)

What's Changed

• Pick Decoding Model Based on Context Dependence by @Mazyod in #19
• Add includes and fix number of params for bio call by @lenzo-ka in #21
• Output an error message when we cannot execute a tool by @cshung in #10
• Python3 by @dhdaines in #22
• update kal email by @lenzo-ka in #24
• Make an option in config for not folding case in phonemes by @lenzo-ka in #26
• Use consistent shebang for python by @acgrobman in #28
• Include SphinxBase code in SphinxTrain by @dhdaines in #29
• Add -sox flag to sphinx_fe to convert files with SoX by @dhdaines in #30
• Update and enable G2P code by @dhdaines in #39
• Fix stalled Queue::POSIX training by @dhdaines in #40
• Minimally fix MLLT by @dhdaines in #41
• Librispeech training template by @dhdaines in #31
• Switch build to CMake and fix a few bugs by @dhdaines in #45
• Include sphinx3_align by @dhdaines in #46

New Contributors

• @Mazyod made their first contribution in #19
• @lenzo-ka made their first contribution in #21
• @cshung made their first contribution in #10
• @dhdaines made their first contribution in #22
• @acgrobman made their first contribution in #28

Full Changelog: https://github.com/cmusphinx/sphinxtrain/commits/v5.0.0