Add some plugin triggers:
o for help
o for language
o for site manager
o for advanced features
Allow to launch directly plugin page (without section key)
Add add_index plugin, available on site manager and advanced features
Configuration page and best help must be coming soon.
git-svn-id: http://piwigo.org/svn/trunk@1699 68402e56-0260-453c-a942-63ccdbb3a9ee
o reduce length of check_key
o fix bugs
o send mail on subscribe/unsubscribe
o add and used $conf parameters
o review keyword of languages
o improve selection/check
o can subscribe/unsubscribe with a link include on mail
o fix bug mass_update collate
git-svn-id: http://piwigo.org/svn/trunk@1116 68402e56-0260-453c-a942-63ccdbb3a9ee
