v2.0.0-beta.1

[amcadmus]

New hardware support:

• ROCM support

Enhancement:

• Document and examples for the C++ interface
• Instructions for the i-pi
• Document for the network size and sel

Bug fixing:

• Illegal nlist fix issue 668 #680
• Bug in prod_virial_grad that causes wrong results when training with virials fix bug in op definition prod_virial_grad_multi_device.cc.  #685
• Uniform random seed Fix uniform random seed #691

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This discussion was created from the release v2.0.0-beta.1.