v0.0.5

• Bugfix: ordering by a part of an index would sort all matching records by the
  remaining orderings not handled by the index, undoing the ordering of the index.
• Use more of an index for orderings:
  • If we have an exact filter from an index that we also order on, recognize
    that as having fulfilled the ordering requirement.
  • Let more than 1 ordering be fulfilled with multi-key indices. only if they
    have the same direction.
  • Our index keys have one or more fields, followed (implicitly) by the value of
    the primary key. If we have consumed our index, and there is still an
    ordering to apply (of same direction) by primary key, also fulfill that
    primary key order through the index.