Plugin settings, more file types and events, proper less/css reloading

- settings file for filetypes/events, with detailed comments
- events and commands now run according to the watch_events setting
- fixed several bugs and synchronization issues with various commands
- the client_watchlist setting is there, but not yet supported (soon though)
- less/css files are properly reloaded, previous custom style tags removed
- server address is now read from the script's src attribute
- changed default urls to more fitting