ASS_Render_Layer_Export

For Maya -- Creates Arnold ASS files for each active render layer set

Original bulk of code by Tim Lehr: https://timlehr.com/export-all-maya-render-layers-as-ass-files-using-python/

List of ASS args found here: https://answers.arnoldrenderer.com/questions/3652/flags-for-mayacmdsarnoldexportass.html

This is not QUITE done yet. Need to edit some stuff and I want to add a UI. But no time right now.