Log Message:
Update tex-memoir to 3.6g.

Changes:
-- fixed a typo in the vplaces env
-- made \needspace work better with \section and friends
-- added \settypeoutlayoutunit such that users can choose in which
   unit the layout list should be written to the log file.
-- removed the \footnoteA--C commands from the manual, they have
   never existed
-- Added \OnehalfSpacing* and \DoubleSpacing* which will additionally
   also make floats and  page notes have the same spacing. Macros to
   explicitly set these values have also been added
-- made it more clear who the maintainer is