ajout de requirements.txt
authentification simple sans ldap
éffacer les contextes d'authentifications complexes

On passe à un truc simple avec flask-basicauth
replace "validate_on_submit()" by "request.form=='POST' and form.validate()" in form checking, as the validate_on_submit seems not to work anymore !
get rid of the form.hiden_tag
construct function to fetch authors that are not already in book's list of authors (and reverse)
modif of db maintenance scripts
modif views to get rid of amazon key problem (temporary)
modif : get rid of auth pb (need to be solved along with amazon)
supress db_repository : supposed to be maintained automatically
modif permissions on db scripts