#49: Updated version to 0.7
#49: Added first draft of JW.AbstractArray.Merger.
#49: Tested JW.*Array.Merger, fixed bugs.
#48: Commit first draft of JW.*Array.Reverser.
#48: Tested JW.ObservableArray.Reverser, fixed bugs.
#48: Tested JW.AbstractArray.Reverser.
#15: Added first draft of JW.AbstractArray.Filterer.
#15: Tested JW.AbstractArray.Filterer.
#15: Added first JW.AbstractMap.Filterer draft.
#15: Tested JW.*Map.Filterer.
#15: Added first JW.AbstractSet.Filterer draft.
#15: Tested JW.*Set.Filterer.
#15: Re-enabled all tests.