First little bit of trie done.

src/lib.rs

@@ -10,6 +10,9 @@ extern crate tiny_keccak;
 extern crate num;
 #[macro_use]
 extern crate log;
+#[macro_use]
+extern crate lazy_static;
+
 #[macro_use]
 pub mod macros;
 
@@ -27,6 +30,7 @@ pub mod overlaydb;
 pub mod math;
 //pub mod filter;
 pub mod chainfilter;
+pub mod trie;
 
 //pub mod network;