Just open a ticket in bero's project, it's still work in progress, so he might break things from time to time.

As for gltf, i assume most popular packages can export it, if not - i know blender has a bunch of gltf exporters, you can also convert collada to it with a khronos group converter project.

Zlib license is no issue for commercial use: https://en.wikipedia.org/wiki/Zlib_License

ios and android: i don't know, ask bero