Loops: remove some dead code
Streams: moved Scalaxy/Loops/Loops-2.11 to Scalaxy/Streams
Streams: add Option&Some stream source and sink
Stream: pass sizeHint to builders from array size
Streams: Prepare ground for CoerceOp
Streams: fix option sinks / sources
Stream: inline Seq(a, b...) source, fix Option.map & flatMap, carry tuple types along better
Streams: try catch typer in plugin
Streams: fix test