Add Out Of Sync test featuire for Xray test: very long TRG TOK PG with only one
CAL.
Add second pattern generator to send first reset at beginning
(after power-up)
Set "correct" delay between two triggers to end up with 90 kHz
trigger rate (where OOS shows up)
Try with just activating two instead of 6 pixels.
Merge branch 'xraydaq'

Conflicts:
	tools/pxardaq.cc