We've released a new version of the linux CPU client (with DS4 support) into the mldstest channel.

This is the biggest change in how the client is built and run since the beginning of the project, so we expect a little bit of chaos. We've already run into one issue where the application runs fine standalone, but segfaults when loading the dataset when running under the boinc client. So expect issues on the test channel over the next few days while we iron out the issues.

Here are the significant changes:

* DS4 (CNN) support
* No more appimage, instead we have a statically linked binary. So a single file download
* Tested standalone to work on on CentOS 7 (new), ubuntu 21.04, 20.04, 16.04, and debian 10 and 11, on both AMD and Intel.
* Compile HDF5, OpenBLAS, and PyTorch directly into the binary.
* Update to PyTorch v1.8

And lots of other little fixes/changes to support DS4. This should set us up for many months to come, so please bear with us as we work out the kinks now.

GPU, Windows, and ARM clients will follow once the basic linux CPU client is working.