Make README.md versionless.

README.md

@@ -2,16 +2,10 @@ rust-rocksdb
 ============
 [![Build Status](https://travis-ci.org/spacejam/rust-rocksdb.svg?branch=master)](https://travis-ci.org/spacejam/rust-rocksdb)
 [![crates.io](http://meritbadge.herokuapp.com/rocksdb)](https://crates.io/crates/rocksdb)
-
-[documentation](https://docs.rs/rocksdb/0.6.0/rocksdb/)
+[![documentation](https://docs.rs/rocksdb/badge.svg)](https://docs.rs/rocksdb)
 
 Feedback and pull requests welcome!  If a particular feature of RocksDB is important to you, please let me know by opening an issue, and I'll prioritize it.
 
-```rust
-[dependencies]
-rocksdb = "0.6.0"
-```
-
 This binding is statically linked with a specific version of RocksDB. If you want to build it yourself, make sure you've also cloned the RocksDB and Snappy submodules:
 
     git submodule update --init --recursive