User configurable database location

 I tried out your plugin today and it's great - thanks for the hard work!

 I found that with my setup (Windows + ClearCase) I had to put the cscope database in the root of _each_ of my source code repositories, duplicating a 100MB database over 10 vobs. This is because windows soft links didn't work very well and ClearCase stops you putting any files in the root directory of all the repositories when used under Windows.

 To help myself out of this situation I added a user setting to specify the location of a cscope database - if you don't specify it then the code behaves as before by searching through the parent directories. I thought other users like myself (Windows+ClearCase) might find this setting useful, of course I understand it probably has limited application for other OS+source control options.