1.21.3.0 
============== FOR TEST ONLY, DO NOT USE IN PRODUCTION ==============
some (heavy) infos removed from sql "appbox.cache.session" :
- structure of bases
- prefs for collections
todo : really remove unused fields (for now data is set to "")
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Bump version 1.22.0.1
1.22.1.0
added option "--enable-phrasea2-log" to .configure
when set, extension logs some ops. in /tmp/phraseanet-extension.log
    ex. :
    ./configure --enable-phrasea2-log
nb. : don't forget to do a phpize before configure
todo : windows version.
Merge pull request #20 from jygaulier/1.22.1.0

1.22.1.0