Determine output file specifications

[thecodeboss]

After running the simulation, we need to determine what sort of output file we will have.

Notes:

• 7D function needs to be saved. There is a 3D function of source position, a 3D function of listener position, and of course time.
• Sample equally spaced points throughout the scene for both source and listener (and we can interpolate between them).
• Will we need to run multiple simulations for different frequencies?
• Compression? These files could be very large.
• Memory optimization? For such large files, we may need clever schemes to keep memory paged properly