formatting

README.md

@@ -2,13 +2,13 @@ rust-rocksdb
 ============
 
 ### running
-- Cargo.toml
+###### Cargo.toml
 ```rust
 [dependencies.rocksdb]
 git = "https://github.com/spacejam/rust-rocksdb"
 ```
 RocksDB 3.8.1 will be pulled in and compiled automatically.
-- Code
+###### Code
 ```rust
 extern crate rocksdb;