Preview release 1.1.0 alpha 1

Warning: This is a preview release - the API might change.

Version 1.1.0 is intended to be compatible with Spark 1.0.2 and Spark 1.1.x, as well as Cassandra 2.0 and Cassandra 2.1.

Changes from 1.0.0:

• Add an ./sbt/sbt script (like with spark) so people don't need to install sbt
• Replace internal spark Logging with own class (#245)
• Accept partition key predicates in CassandraRDD#where. (#37)
• Add indexedColumn to ColumnDef (#122)
• Upgrade Spark to version 1.0.2.
• Removed deprecated toArray, replaced with collect.
• Updated imports to org.apache.spark.streaming.receiver
  and import org.apache.spark.streaming.receiver.ActorHelper
• Updated streaming demo and spec for Spark 1.0.2 behavior compatibility
• Added new StreamingEvent types for Spark 1.0.2 Receiver readiness
• Added the following Spark Streaming dependencies to the demos module:
  Kafka, Twitter, ZeroMQ
• Added embedded Kafka and ZooKeeper servers for the Kafka Streaming demo
  • keeping non private for user prototyping
• Added new Kafka Spark Streaming demo which reads from Kafka
  and writes to Cassandra (Twitter and ZeroMQ are next)
• Added new 'embedded' module
  • Refactored the 'connector' module's IT SparkRepl, CassandraServer and CassandraServerRunner as
    well as 'demos' EmbeddedKafka and EmbeddedZookeeper to the 'embedded' module. This allows the 'embedded'
    module to be used as a dependency by the 'connector' IT tests, demos, and user local quick prototyping
    without requiring a Spark and Cassandra Cluster, local or remote, to get started.