boost/graph/kamada_kawai_spring_layout.hpp:

  - Use T, not double, in layout_tolerance
  - Make layout_tolerance use _relative_ tolerances, only
  - Make default tolerance 0.001, which returns some pleasing graphs

libs/graph/doc/layout_tolerance.html:
  - Document changes


[SVN r24608]

libs/graph

@@ -1 +1 @@
-Subproject commit 455dae4bfe10382143bf37b01935273161e542b1
+Subproject commit 5e84be1a7d629ad66b8987f9fc4b587d839b90f7