Should be useful to speed up paginations

The pagination mechanism now relies on a jquery visible gem, which checks if/when the next link is visible

javascript async and defer options have bad visual secondary effects, thus on hold for the time being

Sometimes we use the domain name as part of a global ID, now this domain name comes from request.domain

This should better handle the "other" country, which OSM has troubles with...

Refs #107

Refs #123

Refs #124

Refs #125