Changelog for data-lens-2.10.0

2.10 (Changes from 2.9.0) ========================= * Removed unused depencencies * Fixed bug in the definition of nullPL 2.9.0 (Changes from 2.0.3) ========================== * Introduced partial/nullable lenses (Data.Lens.Partial). * Altered the associativity of (^.) and (^!) from right to left. * Introduced Tensor type-class to Control.Category -- instanced by Lens and PartialLens.