* 🎉 Added additional DEV-only warnings for improperly configured CellMeasurerCache based on user-feedback for the new API.
* 🐛 Fixed edge-case where restoring :columnCount from 0 wouldnt properly restore previous :scrollToRow offset (and vice versa for :rowCount and :scrollToColumn)
* Updated Grid and Collection to move some state-setting logic related to offsets from componentWillUpdate to componentWillReceiveProps. This change should have no externally visible impact.
