* synch with rel_2_2. Probably the last non manual synch, as rel_2_2 should not be modified deeply.
* code cleaning (cleaning warnings from perl -w) continued
* acquisition rewritte : create a aqbasket table to deal with "bookseller order header".
* add "close basket" feature : a closed basket can't be modified
* suggestion feature : manage suggestions in acquisition (after suggestion filled in OPAC)