Fiducial subsets

[kaitj]

One idea in the past few weeks was to implement the handling of a subset of fiducials (which may be better for teaching purposes). In addition to this, I believe a feature that was implemented in the previous brainhack was to accept fiducials even if they are not in the correct order.

A suggestion is to have an additional checkbox that ignores the number of fiducials in the files and only check for matching descriptions.

Will have to think about this one a little bit more as it may affect content validation (#71)?

[kaitj]

To add from group discussion:

Any fiducial subset will likely be predetermined. A separate table will be created to handle subsets (to keep the full table clean and avoid issues down the line).

That said, this issue will be "on hold" until a subset is created or determined.