update ccm version used
update dependencies
fix integration spec
create changelog
fix processing of empty columns
add copyright header to future spec
add rake-compiler dependency
add murmur3 hash implementation, matching cassandra
add murmur3 spec
fix murmur3 spec filename
compile extensions before running tests
update Gemfile
ignore extension files
fix line endings and use stdint
add extensions to gemspec
[ci] add cassandra 2.1.0 to the build matrix