multiple gpus on one PE using pytorch and hapi callbacks (#303)

Docs Change (#304)

Version Change (#300)

Liveviz (#298)

spdx format license (#297)

cite Norman (#296)

Add LeanMD Mini-App (#294)

miniweather (#295)

Projections support (#290)

change to new cpython api call (#293)

CUDA Callback API (HAPI) (#282)

"Ray mandelbrot" (#291)

CCS in Charm4Py (#289)

Docs - Reductions - added contribute() details (#288)

Drop Python3.7 support (#287)