v0.4.1

ClimaComms v0.4.1

Diff since v0.4.0

Closed issues:

• Check that MPI is CUDA-aware if configured as such (#45)

Merged pull requests:

• Check for CUDA-aware MPI on CUDADevice (#46) (@sriharshakandala)
• Assign GPUs in init, add buildkite tests (#47) (@simonbyrne)