Fixed fixture address suggestion when adding a new fixture

This fixes 2 things:
- universe change
- fixture placement depending on number of channels
Updated README
Added fixture: Chauvet Intimidator Spot 250 (thanks to Henning Borgen)
ArtNet plugin translated
"Enttec DMX USB" plugin renamed to "DMX USB" since it also supports non-Enttec devices

Correction on DMXKing supported products range
Little change on ArtNet output number (just displayed stuff)
Simple Desk can now control all the universes

Improved Fixture Add UI. Values can now be expanded

TODO: Universe reset from Simple Desk seems to be broken
Fixed debian package creation
Added Stairville Matrixx FL 110 DMX (thanks to Heiko Fanieng)
Updated changelog
Update Simple Desk universes list on Show event
Virtual Console Solo Frames can now be collapsed/expanded too