* new buffers are added at the list tail
 * when closing a buffer, the next one is selected or the previous one if it is the tail
 * the ring may be traversed in reverse order
 * undoing a buffer close (Ring::UndoTokenEdit) could be cleaned up to only use standard macros (is slightly less efficient though)

 * mainly we need a custom get_absolute_path() function using Win32 API
 * also the windows.h conflicts with some other headers (esp. BSD headers)
 * also there was a typo in the code setting file attributes

this introduces additional logic but has the huge advantage that the tables can be freed after the macro invocation.
if undo tokens were emitted, the tables had to be kept in the undo stack so they can be restored during rubout.
this however would be both complicated and unnecessarily inefficient since the tables would reach their initial state
during rubout and be deallocated anyways.
 * similar (but not strictly necessary optimizations) can be performed for macro invocations
 * also wrapper Q-Register setting/getting -> will allow a custom "*" register getter (e.g. calculates buffer position
   on the fly)

 * munged files use the same local Q-Registers as commandline
 * :M calls macro without new set of local registers (local register names refer to the parent macro level)
 * only .x names accepted at the moment. for string building characters, this will like stay that way (cannot refer to extended/long names)