[TaggingPreset] Add some values for "match" attribute to determine negative results of matching

[KorneySan]

Current version of match has five values:

• none: neutral, i.e., do not consider this item for matching
• key: positive if key matches, neutral otherwise
• key!: positive if key matches, negative otherwise
• keyvalue: positive if key and value matches, neutral otherwise
• keyvalue!: positive if key and value matches, negative otherwise

It becomes necessary to have negative match result only in some cases.

I propose to add some new values with following meaning:

• !key: negative if key matches, neutral otherwise
• !key!: negative if key matches, positive otherwise
• !keyvalue: negative if key and value matches, neutral otherwise
• !keyvalue!: negative if key and value matches, positive otherwise

It is required because some tag keys have multiple values that partly belongs to different subjects.
For example, with public_transport=stop_position we can use bus=yes which belongs to "road" ways and train=yes which belongs to "rail" ways. Using

<key
    key="train"
    match="!key"
    />

we can ensure that "rail" stop_position preset will not be shown for "road" stop_position.