IMP extraction of index name and of queries and filters
    generation functions
ADD opinion is know associated with a user_code
    For know, the user_code is static.
    TODO : have a dynamic user code.
Merge branch 'master' into multi_user

Conflicts:
	nodejs/index.js
CHG migrating to ads_2.0 model with per user opinions...
    hard wired user_code 12043
Update doc to reference ads_2.
FIX update criteria to have per user criteria
ADD handle per user criteria in webapp
CHG User code is now integrated in urls.
    This is uggly code !!!! Have to test rewrite it from scratch :(
    Also TODO : generate user_code
ADD automatically generate user id on 10 bytes
FIX addClass typo
use the generated user_id in url and some fixes
FIX doc to say that you should run ads_1.0 before ads_2.0