v0.04 Sun, 03 Aug 2008 00:38:56 +0200
	+ added LCS (longest common subsequence) matrix, backtrace

v0.03 Wed, 30 Jul 2008 17:07:33 +0200 (moocow)
	+ fixed doc summary, added edit_pathtrace() function for full path backtrace

v0.01 Fri, 17 Feb 2006 14:00:52 +0100 (moocow)
	+ initial version