6f7c112cc8 include: add description of range proofs focusing on the differences between the implementation and the CA paper (Mykyta)
Pull request description:
Added the description of range proofs in Confidential Assets focusing on the differences between the description in the paper and the actual implementation.
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ACK 6f7c112cc8
Tree-SHA512: c8568883648d6d1f0cbbe9a9730b08512665a90106b974733eecfc3dc628361ff54785c67c355216157af5a63b7fefa52d49df400ccaeec9cbf14d40a600707f