Versatile image exporting

[servantftechnicolor]

• A node aimed to replace intrinsics of a given sfmData with a defined camera type without distortion (Could be pinhole or equirectangular at th emoment).
• Transform tracks and observations to match the new virtual camera

• A node to export images
• Images are transformed so that the source image was taken using the original intrinsics and now appears as if taken using the newly defined virtual camera.

This is meant to replace both export Animated Camera and prepare dense scene when other nodes will be ready.