Pull list of available Cassandra versions from Apache archive
Round time to nearest millisecond when serializing for CQL

Previously we were using '%L' which implicitly rounds down to millisecond
precision.
Merge pull request #169 from outoftime/timestamp-ms-rounding

Round time to nearest millisecond when serializing for CQL
Belatedly update authors list
Bump version
Remove unnecessary case
Fail build if build fails
Cast DateTime to UTC to ensure Rails 3 can convert it to a Time
Be specific