added docs/requirements.txt so rtd can fetch doc dependencies
removed HEAD, Bigdesk and segmentspy site-plugins
fixup! added docs/requirements.txt so rtd can fetch doc dependencies
fixup! added docs/requirements.txt so rtd can fetch doc dependencies
fixup! added docs/requirements.txt so rtd can fetch doc dependencies
fixup! added docs/requirements.txt so rtd can fetch doc dependencies
fixup! added docs/requirements.txt so rtd can fetch doc dependencies
fixup! added docs/requirements.txt so rtd can fetch doc dependencies
fixup! added docs/requirements.txt so rtd can fetch doc dependencies
added sql syntax highlighting to docs

Conflicts:
	docs/sql/aggregation.txt
	docs/sql/reference/select.txt
	docs/sql/reference/update.txt
removed additional download location and increased theme version for local sphinx build
updated CHANGES