Added support for .PYR files

We just added to Digi3D.NET support for locating pyramid images of .TIFF files in external files with .PYR extension. Until now, if the .TIFF file did not have pyramid levels associated, the program tried to load files that followed the following pattern: [filename].tif_[pyramid level], such as 107.tif_32 for the pyramid level 32 of the image 107.TIF. Well, now the program also tries to locate the 107.PYR file. The .PYR file is a .TIFF file (with the extension changed to .PYR) that only has pyramid levels. The advantage of this file over the old system is that it is only one file and not as many as pyramid levels. In addition, we have modified the Pyramid Level Generator program so that it creates .PYR files by default instead of creating a file for each pyramid level. To do this, we have added a drop-down menu to the program that allows you to select the type of file to create. You can see the drop-down menu in the following screenshot: You can see this feature in action in the following video: