Fixture definitions cleanup
XYPad: show position in degrees if possible

When all controlled fixture have properly filled pan and tilt ranges,
and the range is same for all fixtures, the angle in degrees is
computed from the DMX value. Otherwise the value is displayed as percents.
Fix XYPad output
Fix XYPad output
Initialize class members
Fixture Manager: Fixtures channels can now be manually forced to HTP/LTP

Fixed horrible mistake of channel selection dialog look
Fixed universe test
Added fixtures: American DJ P64 LED Plus, American DJ SP1500 MKII, Laserworld EL 200RGY, Botex DSP-405

Added fixture: Showtec Quatro (thanks to Florian Euchner)
Output total fixtures count
Fix hotplugmonitor test - proper lib dir
Refactoring: Add Universe::preGMValue() method
Refactoring: use QByteArray::operator[] and QByteArray::at() instead of data()