update readme with rocksdb installation procedures

README.md

 rust-rocksdb
 ============
 
-### running
-Install RocksDB.  rust-rocksdb has been tested with version 3.8.1 on linux and OSX.
+rust-rocksdb has been tested with version 3.8.1 on linux and OSX.
+Crate version 0.0.3 should work on the 1/8/15 nightly and 1.0.0 alpha.
+###### Prerequisites
+```bash
+wget https://github.com/facebook/rocksdb/archive/rocksdb-3.8.tar.gz
+tar xvf rocksdb-3.8.tar.gz && cd rocksdb-rocksdb-3.8 && make static_lib
+```
+From here, you probably want to ```sudo make install``` to copy the library to the system library directory.  If you don't want to, or cannot due to your system's security policy, there are many other ways to load a library.  One quick and dirty method that may work on linux and OSX is to invoke your code from your project's root directory like so: ```LD_PRELOAD=/path/to/librocksdb.a cargo run```
+
+### Running
 ###### Cargo.toml
 ```rust
 [dependencies]