add TestCompareDifferent and benchmarks
adopt the standard layout for helper command line tools
Make maketables ignore other tables than MA, since it's a superset
implement maketables.go with a list instead of a map so that tables.go is reproducible
add other test vectors
add a .gitignore for maketables
stick the confusables.txt header at the top of tables.go to keep track of versions
regenerate tables