Version 2.3.3

This version fixed nasty bugs in the login cycle. Here are the releasenotes:

• Fixed a bug in the startup cycle on the first discovery queries.
  It turned out that there where a few tables for in there that not all users
  have rights on to see (e.g. Oracle: "dba_db_links")
  Similar bugs for Informix, Firebird, PostgreSQL and SQLServer have been fixed
• Errors in SQL now turn up always with the erring SQL statement in them, so we
  can always see what went wrong.