Attempted fix for #5

NOTE: Before merging, please back the two hauls out of https://catagolue.appspot.com/census/b3s23/D2_+1_gO1s0 - these were submitted using the old, faulty version of the gutter symmetries, and behave as C1 hauls instead (which can be seen by running them as C1 hauls, where they produce the described objects, and running them as gutter symmetric, where they do not produce said objects). Thankfully no further damage has been done, so this backing out of two hauls should be all that's needed to clean it up.

It turns out that I had capitalised one character in hashsoup that I hadn't in samples, causing them to not be the same. I suspect that this is the reason behind why gutter symmetry was generating C1 hauls when gutter symmetries were specified. So hopefully this commit fixes that issue.