2013-11-05 hoelzl 2013-11-05 move Lubs from HOL to HOL-Library (replaced by conditionally complete lattices)
2011-09-11 wenzelm 2011-09-11 misc tuning and clarification;
2010-12-29 wenzelm 2010-12-29 explicit file specifications -- avoid secondary load path;
2009-10-17 wenzelm 2009-10-17 eliminated hard tabulators, guessing at each author's individual tab-width; tuned headers;
2009-06-24 wenzelm 2009-06-24 standard naming conventions for session and theories;