v2.0.0-alpha.0

The very first alpha release of deepmd-kit version 2.0.0. It includes the following new features

• Model compression
• New descriptor: three body embedding
• Hybridization of descriptors
• Long-range modification
• Type embedding (under development)
• Training and inference the dipole (vector) and polarizability (matrix). (under development)
• Split of training and validation dataset. (under development)
• ROCm device support (under development)

Enhancements

• More efficient training: all customized OPs are implemented with GPU.
• Parallel training with multiple GPU support (under development)

Improvement of the code for developers

• Supports version of the model. Easily check model compatability
• Clear and pythonic python interface
• C++ API that can be tested independently
• OP supports multi-device.

Bug fixings:

• remove using namespace std. Solves compiling compatability problem.
• added deepmd namespace for the C++ API