First correct working serialization.

src/lib.rs

@@ -0,0 +1,12 @@
+mod block;
+pub use crate::block::Block;
+mod blockchain;
+pub use crate::blockchain::Blockchain;
+pub mod transaction;
+pub use crate::transaction::Transaction;
+pub mod utils;
+pub use crate::utils::*;
+pub mod hash;
+pub use crate::hash::Hash;
+pub mod keys;
+pub use crate::keys::Signature;