Typos in mysql upgrade script
Bad table name in update scripts; missing mysql FK; refs #174
Instanciate Authentication before Plugins, so latter can access former; fixes #449
Fix undefined index
Browse members in edit mode as well as in display mode; fixes #456
Filters were not properly stored for mailings, exports and so on
Begin export current filter as a CSV file, refs #501
Add a config file to choose exported fields; fixes #501
Minor improvements on plugins management page