Update README with links to implementations #111

Job	Run time
create-and-update	15m 40s
basic-operations/anchor/update	15m 12s
basic-operations/anchor/create-nullifier	22m 3s
counter/anchor	21m 35s
basic-operations/anchor/close	15m 47s
basic-operations/anchor/burn	15m 33s
basic-operations/anchor/create	15m 21s
basic-operations/anchor/reinit	15m 50s
	2h 17m 1s

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