Added support for approximating epipolar lines in satellite images

We have just added to Digi3D.NET the possibility to calculate an approximation to the epipolar orientation of a satellite image. Until now the program showed satellite images with a rotation of 90 degrees, from now on the program calculates the best approximation to the epipolar orientation, so from now on the stereoscopic feeling when loading satellite models will be much better. From now on when loading a satellite model, the menu photogrammetric window/Images transformation shows the option: Epipolar rectification that allows us to activate epipolar rectification on demand. In addition, we have added in the dialog box of Configuration the option RPC Satellite (stereoscopic)/Enable epipolar by default to indicate if we want to activate the epipolar when loading a stereoscopic satellite model. You can learn more about epipolar in satellite images in the document: Epipolar resampling of linear pushbroom satellite imagery by a new epipolarity model. You can see this new feature in action in the video below: