Fix for globbing binary glTF files.

[triplejam]

Binary glTF files are not currently added to the list after choosing a directory via command line. Small patch to fix this.

[TheMostDiligent]

This change makes sense, though there are a couple of concerns:

• First, it changes the default behavior, which may not be always desirable. For example, when opening a Khronos GLTF assets folder, there may be no need to open .glb files as they are duplicates of the .gltf files
• All .gltf models will be in the list after all .glb models. It is expected that they would be grouped by directory, so that .gltf go right after glb in each directory.

[triplejam]

I'm not really sure the ideal way to deal with the first concern. There is no reason a user could not have a copy of the assets folder, decide to modify one of the file(s) in a pair. After which they could no longer be assumed equivalent.

I've implemented a fix for the second.

[triplejam]

Did you have any ideas boss for implementing the first how you want? It could just be by convention if the directories are named like they are in the Khronos GLTF assets folder. There's also more then two encodings the files can be in.

[TheMostDiligent]

My current thinking is to add another command line argument to control the extensions:

--ext *.gltf;*.glb
-e *.gltf;*.glb

Default value will be *.gltf, but it can be changed as needed