Added the expireScreenshot function, which will delete any screenshots that are older than a day, and its checks runs every 10 minutes

Server admins can now change the interval of days to set a screenshot as expired
- Settings now supports double values

Changed ScreenshotExpire to static
Added /version command and added DMP version to mainmenu window title
Removed unused imports
Fixed a bug where if your name contains \n or \r, it will throw on Windows
Merge pull request #213 from RockyTV/rockytv

Added the expireScreenshot function, which will delete any screenshots that are older than a day
Implement admin chat commands
Refactor and add RegisterChatCommand to ChatWorker
Add chat window resizing
Expose the server console client side to admins

godarklight:
AdminSystem.cs