Improve the "Annuaire" view

The "Annuaire" view, that every association can see, has a lot of issues. Here is a short list of what can we do to improve it :

• Adding acronym to improve identification
• Adding the phone number of the president (see #54 (closed) )
• Allow search with acronym
• Correct bug for mandate. The president's name goes to "None" and the end date is not coherent with the info displayed by the mandate view of the association (ex: Forum organisation)