Deprecated tuple CarbonCopy template
* CarbonCopy offered a way of extracting by value copies of whole tuples which doesn't fit the direction I want to take this library
* The same purpose is better achieved by copying a Iterator template instance
* If one wishes to get a _anchored_ copy of a tuple which is not wrapped in a Iterator but directly bound to a BufferIterator, one can use the newly added anchored_copy() member method of Tuple
** This change required storing the base pointer as uintptr_t and casting it as needed
** Additionaly the Tuple now knows its target (either Pointer or Iterator)
** The implementation in this context can not be considered final as it seems forced; I may change it in the future
* Container template currently has no const member methods as they previously returned CarbonCopy instances
* Modified test cases accordingly
* Fixed section titles in README.md