Heavily modified Caseys compare.c, now everything is working


Former-commit-id: 094ccd669e128247c5ee8b9bc388680376a7fc11
Removed large files


Former-commit-id: 605be6c8fd22a5dc2947650880d72f4272f250e5
Removed more large files


Former-commit-id: e4451c09a61fc8cfedec37c32f04c90e8379e45d
Moved showblock test files to 422 repo


Former-commit-id: 75e16f6057e9bf2174312ac31493d6878f63a601