So this implies quite a change for files.
Sorry about conflicts which will be caused.
directory Interface::CGI should now be dropped.
I noticed that many scripts (reports ones, but also some circ/stats.pl or opac-topissues) still use Date::Manip.
* 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)