Ability to download images for KeyshotVR from another server + Linux support

[zyre]

Hi,

I would really like to see an option in the generated KeyshotVR javascript file to allow for images to be downloaded from another server (S3 for example) and given as an array or something similar to that. At the moment only folder names can be given, which assumes that you want to load images from the same server.

Another thing I would like to see support for is linux. We would like to run Keyshot on a virtual machine (EC2) running linux and render models via the python api.

Other than that, awesome software guys. Keep up the good work.