FBO crash on Linux

[MagaTailor]

Running `target/release/puzzlefighter`
thread '<main>' panicked at 'Tried to do something with an FBO without FBO support!', /home/petevine/.cargo/registry/src/github.com-48ad6e4054423464/gfx_device_gl-0.5.0/src/lib.rs:343

[xaviershay]

I don't know what FBO is and I don't have a linux machine to test. So sorry I can't help with this one :/ Looks like an opengl thing maybe?

[MagaTailor]

Naturally; didn't you know you were using OpenGL via a crate called gfx_device_gl-0.5.0?

Never mind!

[xaviershay]

haha all that stuff is a) months old, my brain has forgotten, and b) likely cargo culted :)

[MagaTailor]

:)

In that case you could safely splash a big notice in the README:

OpenGL 3 required

cause that's what these rust libs default to. It could probably be made to work with OGL 2.0 with little hacking.

[xaviershay]

Done in c02965a

Thanks!