v16.3

This is just a minor version update; pushing it out so I can start getting v17 into beta.

• &rooms=room1,room2 has been added for easier multi room transfer (via duncan).

• &website embedding has been greatly improved; twitch/youtube support streamlined.

• Guests will get a message when transferred.

• &scenes can be used by the director to allow for more scene buttons (&scene=3 for example can be used now) (&scene=2 is funky, so keep that in mind if using it).

• &channels is added to the director's options; it lets you output audio of a guest to a different audio channel.

• Improve mobile support; rotating the phone doesn't break the sizing of videos (bug in v16 fixed).

• &videodevice and &audiodevice now support device names and still device sink IDs.

• Changed the fullscreen icons.

• Languages updated (dutch).

• Numerous other polish items added, including some fixes contributed via github by users.

Thank you to everyone for the feedback and suggestions. -steve