Cluster Debugging

Confirmed that hashing collisions are occurring (for Block 10 only between two positions).
The number of positions in fringes now are _almost_ correct.  The number deviates from expected
value suspiciously after the hashing collision.
Merge branch 'savetodisk' of https://github.com/HParker/puzzle-solver into savetodisk

Changes on github repository that were not included in the cluster version.
testing on cluster (same slight divergence on fringe size)