Update LinkPropertyLookupTable.csv

added couple of missing ogc-specs
added some new types from www-domain: sparql, dat, git, geojson
added some new types from foss4g-domain: geogig, geoserver-rest
since this is still a draft RFC, perhaps should be IETF:GeoJSON-d4 or something like that, and use the URL for draft 4 to allow for future versions with different id's. (http://tools.ietf.org/html/draft-butler-geojson-04)