Implement a real search function
As of today, the search function only search through the slugs, which isn't pertinent.
We need a search function to search through all the objects (representatives, proposals, recommendations). We need full text search for that, but also - since it's EU and there's more than one alphabet - a way to convert to latin-9 characters from polish for instance.
Partial search and filters shoudl also be taken into account (only the representatives active in INTA for instance).
haystack should probably be considered.
La Quadrature du Net already uses SolR for its main website, so we can probably use this instance. But providing other searchbackends should be considered.