Updated to 1.59, added "Replace, With Wipes" comparison mode

Hi guys,

This is actually two updates, one of which just brings rv-integration-package up-to-date with RV 4.0.11 (prerelease).

The second adds a "Replace, With Wipes" comparison mode. We use that a lot instead of the "Over" mode, so it makes sense (at least to us) to have that as a default option.

This change won't break screening_room v1.42. I've added the same comparison mode to that package as well, but there's no git repo for that one. Here's mine: https://github.com/mjmvisser/rv-screening-room

Hope you can merge these, I can see other studios finding this useful when diffing images with an alpha channel.

cheers,
-Mark