montage_ufmfs: missing --obj-only parameter

[fieldbio]

The previous analysis steps have --obj-only parameters but montage-ufmfs doesn't. If you try to input a set of frames into montage-ufmfs that have objects that to not have 3-D orientations it doesn't work. To get around this you can analyze the entire h5 file, but this is very time consuming if you only want to get a video of a short sequence.