Added tree-find.

Author Pascal J. Bourguignon <pjb@informatimago.com>
Author date 2013-07-27 10:58:45
Author local date 2013-07-27 12:58:45 +0200
Committer Pascal J. Bourguignon <pjb@informatimago.com>
Committer date 2013-07-27 10:58:45
Committer local date 2013-07-27 12:58:45 +0200
Commit 0e21c395ded06ff46f5f32d07056dcefc5949c60
Tree 8b4b0f96a06b7ad482ef8eda75fd4af06ef46a4f
Parent 5fe7d00d51c829c519799541847128795dbfbc19
Added tree-find.
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