-Write a stub for getting info from the tarball/validifying the tarball. Read distren-job.xml, a file in the tarball, to find out 1. which rendering system to use (that system, e.g. blender/povray, can read more specifics, such as name of file to pass to blender and frames. Options common between different systems will be handled in common as best as possible)
-Write a stub for publishing file and constructing job description so that the job can be shared
*-Other XML-writing/reading
x-frame_finder() needs to return both the job number and the frame number