Add code to udpate fixtures.pro automatically
Update fixtures.pro - some fixtures were missing.
Missing Fixtures: Second Attempt

- implement Massimo's idea of using *.qxf
- not tested, since unit tests don't work now
XYPad: fix tilt channel on higher univrses (2,3,...)

Reported by Davide and oamze.
Monitor: it is now possible to set a background image to the 2D preview
Plugins/Peperoni: improved input thread
Fixed video removal crash
New fixture: Beamz LCB-252, Cameo LED RGB PAR56 Can (thanks to Sascha Büttner)

New fixture: Monacor LSX-142SRGY, Kam Laserscan 1000 3D, Chauvet DMF-10, TSSS XL35 (thanks to Robert Box)
New fixture: Martin RoboColor-III (thanks to Boudewijn)
Improved monitor background code