Change project directory structure according to application structure.
Change 'nox' configuration option to something more meaningful 'nogui'.
Rename 'Icons' folder to 'icons' (similar to other folders).
Partially add 'nowebui' option support.
Remove QConf project file.
The slider has a max value, but it's changed whenever a value greater
than it is specified.
Note: 65535 is the maximum value allowed by libtorrent.
Closes#2373.