Minor change
Non-static temporary storage for points and annotations
Use NSUInteger everywhere
Remove import of unneeded assert.h
Minor changes
Simplify node storage
First implementation of iterative preorder
Iterative traversal block works
Simplify flow before complicating
Fix pointers
Minor change
Fix malloc
Hand-crafted primitive stack works
testIntegrityOfAnnotationTree: use stack-based iterative algorithm
Snapshot version of crashing code
Iterative tree building algorithm works
Minor cleanups
Cleanups
Annotation tree: improve copying
Make improvements based on feedback by Nik Nikonev