Add a matchesParent method to Matcher.

This new method is the complement to matches in that it tells you if the given path matches any section of the pattern. Also added a MatchesParentVisitor to provide the implementation for this new functionality.
Update comment to be clearer as to what is going on.
Merge pull request #14 from PressAssociation/matches-parent

Add a matchesParent method to Matcher.