Code refactoring and inverse design

OpenBTE has changed architecture. Main changes:

• Using Multiprocessing module instead of mpi4py.
• Development of low-level primitives for geometry building and solvers orchestration.
• Revamped documentation, which is still WIP.

Furthermore, this version introduces the inverse design sub-package. Reference: https://arxiv.org/abs/2202.05251

openbte-3.0.0.tar.gz

Heat sources and thermalizing boundaries

• Thermalizing boundaries
• Heat sources
• Possibility of simulating heat transport over disks
• Retired isotropic models (except for the 2D gray model)
• Changed the keywords for the rta.npz into more expressive ones
• Migrated container from Docker to Github (experimental)
• Retired the command line interface