Merge pull request #26 from yaitskov/master

add link to cqlsh
updated Cassandra version to 2.0.3
fixed join issue #29; added condition statement to check type
cassandra seeds input can now be defined as array seeds or csv list of seeds
Merge pull request #30 from cevaris/fix-seeds

cassandra seeds input can now be defined as array or csv list of seeds
Merge pull request #28 from cevaris/master

updated Cassandra version to 2.0.3
Switch to Apache archive which serves versions other than the most recent one
Oops, don't use md5 of a source package