Allows for application of all rules on an annotated sequence
via apply_all method.

1) MatchOperator was essentially a wrapper for "match" section of "apply" operator
2) Other operators like Repeat actually used ConjConditions directly, without using MatchOperator
   - so ApplyOperator could too!
3) The confusion was about "match" referring both to part that is matching
   sentence against match conditions, and the results of this matching process.
   That led e.g. to "match_operator" rule in grammar, which was unlike
   "strset_operator" rule and the like. "match_operator" was about
   the "match" section in "apply" and now it is more straightforward.
   Next step should rename "match_fit" to be actual "match_operator",
   consistent with "XXX_operator" for other XXX types.

Also, adding M in grammar to be shorthand for $m:_M (vargetter) op in match context.

Basically a ParsedExpression wrapper for Variables and ApplyOperator.

A condition that repeateadly matches an array of conditions returning resulting vector of vectors.