moved sql migration.

src/migration.rs

@@ -91,7 +91,7 @@ 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/create_tables_001.sql").as_ref().to_string());
+    ret.push(resource_str!("migrations/sql/create_tables_001.sql").as_ref().to_string());
     return ret;
 }