TransformationCombinators: renames

TransformerOpt, Transformer3 |-> TransformerOptBase, TransformerOpt.
TransformationCombinators: Improve laziness
TransformationCombinators: add variant with multiple results
TransformationCombinators: misc
Switch to Scala 2.10.0
Further notes on transformer combinators
IDEA project changes
Update IDEA project to 2.10.0
IDEA project: disable using FSC
Merge branch 'master' of github.com:ps-mr/LinqOnSteroids