changed default[:cassandra][:tarball][:url] to "auto", in order to evaluate URL according to current version during runtime
added doc for "auto" option for node[:cassandra][:tarball][:url]
Added support to cassandra-rackdc.properties file
Added support to new cassandra.yaml attributes: max_hint_window_in_ms, partitioner, key_cache_size_in_mb, range_request_timeout_in_ms, streaming_socket_timeout_in_ms, index_interval.
added documentation for new attributes
added node[:cassandra][:enable_assertions] attribute
Added JVM per thread stack-size attribute (-Xss option)
added attribute node[:cassandra][:jmx_server_hostname]
Added node[:cassandra][:auto_bootstrap] attribute
removed unwanted package managers
Merge pull request #39 from chaordic/master

Adding new attributes to cassandra-server cookbook