refs #5801 remove some kruft, make the comparison function consistent, juice up the min key size to 8. now, keys are interpreted as an array of 8 byte little endian ints with 0-3 extra bytes at the end


git-svn-id: file:///svn/toku/tokudb@51156 c7de825b-a66e-492c-adef-691d508d4ae1