2005-12-05 * 0.2.1 * Fixed a documentation bug, reported by Gary Wright
                     <at2002@mac.com>.
                   * enable/disable index reference cache added.
                   * LazyList#sublist added to generate sublists that
                     share elements with their "super" lists.
2005-10-08 * 0.2.0 * Lots of changes (without backwards compatibility):
                      - Now the usual methods from the Ruby Enumerable module
                        should be much better supported.
                      - In general there are more finite lazy lists returned
                        from methods (for example: lazylist[a, b] or
                        lazylist[a..b]) instead of arrays.
                      - mapper, filter and combine methods give an 'obsoleted'
                        warning now, you better use map, select, and zip from
                        now on.
2005-09-26 * 0.1.3 * Fixed some Ruby 1.9 incompatibilities.
                   * Added default arguments for drop&take.
                   * I've decided to pollute the Kernel module with the #list
                     method. Sorry, if you don't like it. ;)
2004-09-30 * 0.1.2 * Added combine method.
                   * The ref method now uses a hash to cache return values.
                     This is not what I would still call a list datastructure.
                     It increases memory consumption (as if that would matter
                     anymore), too. But it speeds up things a great deal, if
                     you persist on using indexes into a list.
                   * Rakefile added
                   * Supports Rubygems now
2003-09-12 * 0.1.1 * Initial Release
