Add link to full docs to README
Add link to full docs to README

arkpar/rust-secp256k1,arkpar/rust-secp256k1,apoelstra/rust-secp256k1,arkpar/rust-secp256k1,apoelstra/rust-secp256k1,apoelstra/rust-secp256k1,apoelstra/rust-secp256k1,arkpar/rust-secp256k1,arkpar/rust-secp256k1