Revert "Revert "Add Lr cairo button for the import from Lr support.""

This reverts commit aff265413042fbe08e7cf21a06ffffd4520642d7.
Revert "Remove Lr button from darkroom."

This reverts commit 7acb43cc9d25962afa60d2659d5bbf420782c7ba.
Handles all the orientation as defined in the tiff:Orientation node.

Previously only the landscape orientation was taken into account.