klao [Wed, 01 Mar 2006 17:37:25 +0000] rev 1994
bugfix: moving "invalid.h" down to "bits" broke autoconf
deba [Wed, 01 Mar 2006 13:19:28 +0000] rev 1993
utility, invalid and traits moved to bits
deba [Wed, 01 Mar 2006 12:46:52 +0000] rev 1992
UNDIRGRAPH_TYPEDEFS => UGRAPH_TYPEDEFS