Better union find in theory, but probably no different in practice.


git-svn-id: http://es-lab.googlecode.com/svn/trunk@817 aeea10e6-ec39-11de-83d8-6d5adf01d787
Catching up to Caja's latest


git-svn-id: http://es-lab.googlecode.com/svn/trunk@818 aeea10e6-ec39-11de-83d8-6d5adf01d787
Non-writable non-config data props with primitive values, like Number.EPSILON, are harmless.


git-svn-id: http://es-lab.googlecode.com/svn/trunk@819 aeea10e6-ec39-11de-83d8-6d5adf01d787