Revision history for Perl extension Chemistry::Pattern.

0.20  31 May 2004
        - Added support for disconnected patterns.
        - Completely replaced the algorithm with a simpler and somewhat more
          readable one.

0.15  07 May 2004
        - Some optimizations (most notable when doing a global match on a large
          molecule) and improved encapsulation

0.10  27 Feb 2004
        - First release
