Added initialCommand to the build
Updated Castable support for as[Type](key) & getAs[Type](Key)

Now we can cast from a List[_] to and from a MongoDBList or BasicDBList.
Also we can cast from Map[String, _] to and from a MongoDBObject or BasicDBObject

https://jira.mongodb.org/browse/SCALA-136
https://jira.mongodb.org/browse/SCALA-140