Many Updates

- Added greeting dialogs.  Users are now greeted with a dialog when they
login if you define one.
- Added server title and position at the top of the screen in GUI.
- Added /f shortcut to send faction only messages
- Added /admin scan trash and /admin delete trash to remove grids that
have no owners that have no functional blocks or terminal blocks
- Added /admin notify to pop up a notification on user's screens
- Added /admin scan overlimit that will scan for grids that contain too
many of a block type.  For example /admin scan overlimit LargeBlockDrill
26 will show all grids with 26 or more drills.
- Some refactoring