Moins de requêtes

Fewer database requests are issued.

Misc

• Use django-debug-panel to get debug panel even with Ajax calls (it requires Chrome and this extension)

K-Fêt

• Access to properties of Account and AccountNegative models doesn't issue more requests to CofProfile and User instead they select_related these models the first time only.
• Fewer requests in kfet.views and kfet templates.
• Fix bug on real_balance property of Account objects (happened if negative entry exists, but balance_offset isn't set).

BdA

• Fewer requests in bda.views.
• If a tirage is launched more than once, relatives instances of reventes system are deleted.