binning wildcard now requires "bin" in it
binning wildcard now requires "bin" in it

this way the binning wildcard must contain "eccen_bin", "hemi_bin", or
"no_bin". this doesn't prevent us from combining no_bin with one of the
others (in which case no_bin will be ignored) or passing just
hemi_bin (in which case it will be ignored), but it will at least
prevent the binning wildcard from grabbing bits of text meant for one of
the other wildcards, making the error a little more transparent

billbrod/spatial-frequency-preferences,billbrod/spatial-frequency-preferences,billbrod/spatial-frequency-preferences