Move all pages for subscription member in adherent/subscription (Card / Info / List)
Rename llx_cotisation in llx_subscription
Rename all db field cotisation in subscription
Rename class Cotisation in class Subscription

Is it ok the 2 else blocks are the same?

NULL by defaut. 

This reverts commit 452f7be4.

Conflicts:
	htdocs/websites/class/website.class.php

Fix date of supplier proposal missing.