Basically a ParsedExpression wrapper for Variables and ApplyOperator.

MatchVector, AnnotationMatch, TokenMatch are now MatchData
MatchData is value_type of Match which now has get_value/set_value
Match has also copy construction working properly now
Default value for Match holds MatchVector so adding $m:_M var in grammar works as intended.

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

MatchResult - change constructor so when you provide Match it defaults to matched = true.
TokenCondition - be a bit defensive about possibility of inner predicates changing $_

It's a tuple boolean/Match Value - "is it matched?"/"actual match"

Previously effectively agreement was checked on all categories,
even if a lexeme's tag didn't have some of the selected categories.
That led to treating such lexeme as not agreeing with one that had
more matching categories, even if it was agreeing on all categories
that were present.