lemon/concepts/heap.h
2008-01-07 Happy New Year to LEMON (+ better update-copyright-header script)
2007-12-27 Renaming state_enum to State
2007-03-03 Happy New Year to all source files!
2006-10-26 Bug #46 fixed: Superfluous template parameter in Heap concept
2006-10-24 concept -> concepts (namespace & directory)