Version 4 Released

- Moved from libpq++ to libpqxx, need to install this library;
- Upgraded code using Sablotron, this requires newest version (1.0).
- Many bugs fixed (especially with playing with qmail files);
- Special programs for changing qmail files (better privilege separation);
- Changed tables used to store login information;
- Added module for vqwww that allows to browse login history;
- Changed parameters passed to XSLT (uri is now called REQUEST_URI);
- Translated vqwww into English, language can be selected at the login.
- Better documentation.
- Better error reporting.