Add support for targa files in Gluon
If I have a tga file selected in Gluon, I just see the windows file icon for it instead of a preview of the image. Other file types, such as png show a preview of the image when selected.
Targa is a common file format used for video game textures
It would also be nice to have native Diff support similar to PNG, BMP, and GIF file formats. For the time being, we are force to use Beyond Compare (Picture Compare).