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- Change Verifier to support verifiying multimessage signature using aux pubkey - Update example and tests.
…get verifier. - Add separate aggregator for the verifier and the prover.
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This PR removes the single message pop aggregaor used for aggregated nugget BLS and add support for multi message verification using nugget BLS (verifying using auxilary public key in the Signature group.
As a result It rename
MultiMessageSignatureAggregatorAssumingPoP' to 'SignatureAggregatorAssumingPoP(as there is no single message aggregator any more), so there is no place for confusion.The aggergator could verify the signature using either public key in the G1 or G2. If the public key in the signature group doesn't exists the verification in Signature group simply fails.