[evol] use SQL sessions instead of cookies-based ones
[evol] partial upgrade to rails 2.2.2 (config+js) (full upgrade cancelled due to incompatibility with current gettext)
[fix] renamed 'technique' into more appropriate name 'artwork_support', and update schema and translations (Closes #4)
[evol] created a simple logon system, protected admin pages, and added a logon indicator/link (no user management yet, only a deadend entry in the menu if admin)
[lang] updated french translation and french application title
Initial version