Instrument change logs

To centralise the information about work that is done to each system (be it hardware or software) a new database system was set-up where things can be recorded and checked. In general, this just contains a minimal description and a date which already can help a lot in pointing to, or excluding possible causes for a problem. The system allows checks by date, sub-system (e.g., ALFOSC, Telescope, etc) and type (e.g., software, electronics, etc), or a combination of them.