More quicklogger.vbs

I modified the quicklogger VBScript again. In addition to its previous functionality, it will now

• repeat the last activity description if the user enters " " " (the double quote character) into the input box, and
• save a semaphore blockfile for the day (and stop keeping track of time for that day) if the user enters "*STOP*" (in upper or lower case) into the input box.

The new version is available here. A webpage at my website devoted to quicklogger is available here.