Instrument change logs

It was noted that often in discussion about problems people are not sure when certain changes to the system (hardware or software) were made which might have caused the problem. Some information is kept on a personal basis or in log files, but there is no specific place where things can be recorded and checked. In general, no extensive information is needed but just a short title and the date would already help a lot in pointing to, or excluding possible causes for a problem. The idea is to make a general depository where changes are classified in a similar way as our fault reports. This would allow for checks by date, sub-system (e.g., ALFOSC, Telescope, etc) and type (e.g., software, electronics, etc), or a combination of them.