SQUASH ME - make `ant gen-doc` work again (in a preliminary way). update README.md too#19

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michaelsembwever wants to merge 4 commits intopolandll:cassandra-3.11from

thelastpickle:mck/16763/cassandra-3.11

Commits on Dec 18, 2021

CASSANDRA-16763: Migrate documentation to AsciiDoc

polandll
authored and
ossarga
committed

Commits on Dec 19, 2021

CASSANDRA-16763: Cleanup AsciiDoc after RST replacement

polandll
authored and
ossarga
committed
CASSANDRA-16763: Updated license check and gitignore
ossarga
committed

Commits on Jan 1, 2022

SQUASH ME - make `ant gen-doc` work again (in a preliminary way). update README.md too.
michaelsembwever
committed