fix missing free() in test_tree_add_duplicate_root

fix uninitialized simple_destructor - fixes #443

implement cxTreeRemove() with re-link function

rename cxTreeRemove() to cxTreeRemoveSubtree()

fix bug when removing the root node of a tree

add test for simple destructor in trees - fixes #436

complete implementation of remaining high level tree functions

implement cxTreeInsert family of functions

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mercurial