Migrated all resources into the resources' directory.

src/migration.rs

@@ -94,7 +94,7 @@ fn check_migration(tx: &Transaction, id: usize, migration: &String) -> Result<()
 fn get_migrations() -> Vec<String> {
     let mut ret = Vec::new();
     ret.push(
-        resource_str!("migrations/sql/create_tables_001.sql")
+        resource_str!("resources/migrations/sql/create_tables_001.sql")
             .as_ref()
             .to_string(),
     );