Update a geosearch index about tntsearch HOT 1 OPEN

I think we need to implement, in the TNTGeoIndexer, its own insert and delete methods. Currently, since it inherits from TNTIndexer, these 2 methods do as if they were in a classical indexer, so they manipulate your tables that don't exist

For example, the insert method could be like this :
public function insert($document) { $this->processDocument(new Collection($document)); }
to avoid the process linked to table total_documents .
In the same way, the delete method should juste delete row for table locations

from tntsearch.