Resolved issues

#260 - Rename MapConfig, SetConfig & QueueConfig in Java to reflect their storage types #259 - Remove Function type param from SetMap #258 - Java's Set.stream is returning Stream instead of Source #257 - Add asJava to interop with java.util.Map #256 - Terminate Bag on close #255 - Implement Source for Stream #253 - Add Stream.materializeBuilder for custom collection type #252 - SwayDBExpireSpec test failing