Fix #48

Removes monero, yet we still use monero-rs's base58 and epee libraries.

coins/monero/src/wallet/mod.rs

@@ -4,6 +4,9 @@ use curve25519_dalek::{scalar::Scalar, edwards::EdwardsPoint};
 
 use crate::{hash, hash_to_scalar, serialize::write_varint, transaction::Input};
 
+mod extra;
+pub(crate) use extra::{PaymentId, ExtraField, Extra};
+
 pub mod address;
 
 mod scan;