Added warning about SLEEP value
[git-p4: depot-paths = "//src/minitest-bisect/dev/": change = 9672]
Refactored bin/minitest_bisect_files and put meat in lib
[git-p4: depot-paths = "//src/minitest-bisect/dev/": change = 9673]
moved the rest of bin into lib
[git-p4: depot-paths = "//src/minitest-bisect/dev/": change = 9674]
Cleaned up by pre-declaring minitest mod
[git-p4: depot-paths = "//src/minitest-bisect/dev/": change = 9675]