Switch query execution to using lazily initialized prepared statements
Fixed name convention for prepared statements, swiched from using .bind(...) to just passing PS and it's params to session.execute(...), TODO: problem with LIMIT clause in get_follower_usernames
remove #todo, issue was due to running with older version of cassandra
update readme to highlight requirement of Cassandra 2.0 or later
Merge pull request #24 from lyubent/master

Switch query execution to using prepared statements