[ACTION-208] Add voting support to Locationzation Quality Précis

Hi all,

I've added the attributes locQualityPrecisVote and locQualityPrecisVotePointer to the data category.
http://www.w3.org/International/multilingualweb/lt/drafts/its20/its20.html#lqprecis


- The name is not great maybe we should have locQualityPrecisVotingScore and locQualityPrecisRangeScore but this is getting just too long and probably confusing.

- I've adapted an example to show the voting, but a better one are certainly welcome.

- Currently we can use either vote or score not both. This allows to share the threshold. Hopefully this is fine. Otherwise we may have to also have a threshold for the voting.

- We've talked about harmonizing the scores/ranges in general. Currently locQualityPrecisScore is an integer between 0 and 100 (inclusive). Should we move to a decimal between 0 and 1?

Cheers,
-yves