Installer Version 2

[MikaylaFischler]

• [ ] Show a percentage of progress
• [x] Wait on key press before continuing instead of using os.sleep
• [x] #313 Ability to download new installer
• [x] #274 Deleting unused/removed/moved files
• [x] #258 Versioned graphics component
• [x] #282 Versioned common code
• [ ] Announcements functionality
• [x] ~~Detect in installer if local is actually newer than remote version?~~ just say 'different' rather than 'newer'
• [x] #336 Remove remove
• [x] #382 Don't delete mounts (isDriveRoot())
• [x] Prompt to delete unknown root folders
• [x] Properly handle non-standard log.txt files
• [x] Remove usage of config.lua
• [ ] Remove delete protection of config.lua
• [x] Skip extra prompts/dialogs if the update has nothing to actually update
• [ ] Remove warning about alternate install method