DM-Sim-V1.0

This is the release of DM-Sim associated with our SuperComputing (SC-20) paper titled "Density Matrix Quantum Circuit Simulation via the BSP Machine on Modern GPU Clusters". In the this version, all the gates of the target quantum circuit needs to be embedded & inlined into a GPU global function. We discussed the details in the SC-20 paper. In the following release, in order to flexibly use the simulator in Python, we will change the design of the implementation so that when a new circuit needs to be executed, we can directly launch & run without the need to compile. This will facilitate the patterns of quantum-classical hybrid algorithms where the circuit needs to be generated & adjusted at runtime.