MFH: cosmetics
MFH: -Pointer doesn't move if we're moving forward and shifting at the same time -Userland implementation -Doxygen doc
MFH: Iterator implementation in SplDoublyLinkedList, SplStack, SplQueue
MFH: Typos (Dan Scott) ctor inside the structure. dtor/ctor used on push/pop for better potential interoperability
MFH: Fix mem errors
MFH: fix win build
Fix ZTS build, fix tests
MFH: Implement splDoublyLinkedList, splQueue, splStack classes in SPL
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