New fixture: Martin RUSH Par 1 RGBW (thanks to Russell)

New fixture: Chauvet SlimPAR QUAD 12 IRC (thanks to Robert Box)
New fixture: Cameo LED Colour Bar RGBA (CLBAR10RGBA) (thanks to René Brixel)
New fixture: Showtec Led Air Cone Pro (thanks to Joep Admiraal)
More doc improvements
RGBScripts: added circles.js
Store relative paths to monitor and widget backgrounds
Change word "gap" to "width" in capabilities editor.
Speed dial doc improvements