Fix scraping completely

[Lykos]

• Safety net when saving algs should never be necessary.
• Midges and edges should be distinguished.
• parse errors should be fixed.
• better fixing algorithm
• Big chunks outside the valid table should be reprocessed

[Lykos]

• Midges and edges are distinguished (at least if it's obvious from the alg set that only one matches)
• Safety net when saving algs is necessary because of discrepancies in cube size. E.g. an algorithm with an Rw3 might seem valid on 5x5, but when checking on a 4x4, it's invalid. See branch slice_tests for a half-fix.
• Fixing algorithm mostly needs to be improved for big cubes.