[FEAT] (protovis Bullet layout) Added a mark-wide property "originIsZero" to allow preventing that zero is always part of the scale. Also added the "minimum" mark property, to pair with the existing "maximum" mark property.
[FIX] (protovis) NPE occuring when a handler is registered for page load, after the page load had occurred. No event object is available in that situation.
[REF] (CCC Selection) Small refactorings and cleanup on selection code
[FIX](CCC userSelectionAction) Documentation stated that the handler supplied a pvc.visual.Context as JS content/this but it was being called on the global object.
[FIX] (CCC plot2SeriesIndex dataPart) Bug that occurred when an explicit reader for the "dataPart" dimension were defined, in a *relational* resultset.
    The option plot2SeriesIndexes was being registered even though the dataPart dimension was already being read.
[FIX] (CCC extension points) Do not intercept protovis pseudo-properties (those not in the Mark#properties hash).