BitVector is a fairly extensive and fast BitVector class for Ruby. Handles sequences of up to 2**32-1 bits (about 500 Mb). Implemented as a wrapper around Bit::Vector version 6.3 by Steffen Beyer. Authors: Robert Feldt , Akinori MUSHA WWW: http://www.ce.chalmers.se/~feldt/ruby/extensions/bitvector/