Release restbase-cassandra v0.3.2
Log errors in the cassandra backend

- Pass an options object with log & conf around
- Use the log method for logging of issues
- Don't try to update a secondary index if the primary update failed
Increase the back-off delay on table creation & release v0.3.3

- start with a delay of 100ms
- increase by a factor between 1.5 and 2.5 on each retry
- log any failures
Merge pull request #36 from gwicke/buffer-conversion

Improve error handling & release v0.3.3