Changes

1.0.1 2014/01/28
 - Update license to LGPLv2.1+
 - missing CHAR_BIT macro for some platforms

1.0 2012/10/05
 - Add Patricia#nodes methods to return all nodes as a Hash

0.09 2012/07/18
 - fix bounds error leading to "invalid prefix" exceptions

0.08 2011/08/12
 - IPv6 support: Patricia.new(:AF_INET6)
 - minor internal cleanups and speedups

0.07 2010/09/23
 - fix segfault from unpredictable GC ordering
   when node objects outlive the trees they come from

0.06 2010/09/14
 - rely on Ruby GC for allocations/free
   no need to explicitly destroy objects anymore
 - Ruby 1.9.2 C API compatibility
 - allow creation of subclasses of Patricia class
 - non-String objects may be stored as node-data
 - Patricia::Node objects are returned when match succeeds
   It's no longer possible to call tree methods on node
   objects and cause segfaults.
 - Patricia#show_nodes may be given a custom IO-like object
 - sync docs with remove, match_best and match_exact behavior
 - ArgumentError is raised for invalid addresses
   no more assertion failures for bad addresses
 - Patricia#show_nodes and Patricia#num_nodes no longer
   segfaults on empty trees

0.05 2010/03/12
 - reorganized directory layout
   no chance of accidentally having 'extconf' in the require path

0.04 2008/2/19
 - fixed the bug of "clear" method (destroy)
   node data were not cleared correctly

 - fixed the memory leak in search methods
   I had to clear the prefix instances

0.03 2008/2/17
 - fixed the bug of allocating user_data strings

0.02 2008/1/31
 - fixed the bug of printing prefix for 64-bit architecture 
   from Aki Nakao

0.01 2007/11/16
 - the first version