Array.bisect implemented, see ticket #433
rename Array.bisect into Array.bsearch
take into account minor maintainers comments
don't open BatOrd
Add List.subset
Fix List.subset to take a comparator instead of a predicate
Merge pull request #480 from UnixJunkie/batarray_bsearch

Batarray bsearch
Merge pull request #481 from jpdeplaix/subset

Add List.subset