Initial commit

First pass at a thrift driver for cassandra. Liberally takes ideas from
@lpgauth's cassanderl (https://github.com/lpgauth/cassanderl), but with
a newer version of thrift, and poolboy instead of dispcount

Each keyspace creates a new pool.  Old pools are not GC'd

- Thrift command complete

- cql commands sent over thrift
Merge branch 'master' of github.com:dieswaytoofast/erlang_cassandra