MappingIterator renamed from LazyCallbackIterator.
Updated protected API.
offset* methods are now contain the implementation. The other methods refer to them instead of the other way around.
Bug fix for SortedMap. When setting a value for a key that already existed, the value was not updated.
Added some performance tests for maps.
Inlined rotateSingle* for performance reasons.
merged in latest from upstream:master
Merge branch '5.3_compatible' of https://github.com/orourkek/Ardent into 5.3_compatible