changes on Fiche, normalize Search code

changes on Fiche, normalize Search code

Fiche :
    - Hide the «formation» if the field is empty.

Search :
    - Normalize a lot of stuff.
    - Shorten urls when possible (all hardcoded settings like with_soundex disappeared !).
    - Factorise more bits of code.
    - Prepare search to be an quite independant module.

git-archimport-id: opensource@polytechnique.org--2005/platal--mainline--0.9--patch-16