+ Added `make docs` target to primary Makefile to generate documentation
~ Update documentation dependencies
~ Updated `tcl.py` to handle JSON lists of elements including whitespace by joining them with a comma (unless one of the elements already contains a comma), resolving odd JSON syntax
~ Re-organized and re-order configuration variables and edited descriptions for general consistency as well as adding anchors
~ Update all documentation dependencies
~ Fixed a number of broken links
- Remove dependency on `docutils` and `sphinx-autobuild` (both unused)
- Remove two of the custom documentation extensions
~ Documentation all moved under `docs/source`, arranged hierarchically according to the table of contents
~ `Klayout` changed to `KLayout` in all logging messages
~ Readme rewritten to just be concise, parts of it isolated into standalone documentation
~ RTD builds no longer use conda (saves some time)
~ Fixed all broken links
