A kwin script to "group" windows together.

Adds a menu entry to the windows' context menu to add/remove the window from groups.

Any member of a group that is:

• minimized causes the rest of the members to minimize.
• unminimized causes the rest of the members to unminimize.
• activated causes the rest of the members to activate (come to the front).

Since I haven't yet had a chance to package this into an actual kwin script package, the easiest way to test it out is to run wm console.

1. Run wm console
2. Open the kwin-script-groups.js file.
3. Click execute.
   Note: You can safely close wm console now.