Code Modernising

What's Changed

• Code restructuring by @xw-w
• Docstrings by @xw-w
• Docs site by @xw-w ; https://traplimitedconversion.readthedocs.io
• Updates to sc-fermi solving algorithms to follow doped approach
• Clarify units, use scipy.constants, cleanup, acknowledgement of templated code etc by @kavanase in #3
• More Cleanup by @kavanase in #7
• Update docs requirements by @kavanase in #9
• Add degeneracy factor for recombination rate calculations of amphoteric defects by @xw-w

Full Changelog: v0.2...v0.3