* Updated Metadata page: add common and additional metadata fields by
document types and connectors
* Updated specific installation extra by document types and connectors
* Added embedding brick page in Sphinx TOC
* Fixed Sphinx warnings in new pages
Documentation Overhaul
- Added documentation hierarchy
- Added options for Bash vs Python for API & Upstream Connectors
- Added Introduction section (Overview, Key Concepts, Getting Started)
- Redid connectors section
- Installation is now broken up (needs further work)