Updated cql-rb driver to v1.1.2
Recurse to deal with collection individual types in #to_cql_value method
Rails 4 Tests
Added C* double column type
Updated .rvmrc to use .ruby-* files
Added instructions for C* collections
Added simplecov and hook into coveralls (code coverage)
Merge pull request #18 from integrallis/rails4

Several improvements
Merge pull request #19 from integrallis/readme_update

Added create_index example to README
Version bump to 0.0.6.