Looping daq.begin

[ZLLentz]

Expected Behavior

It should be easy to loop daq.begin to do simple data collection, then ctrl+c to exit the loop.

Current Behavior

ctrl+c is caught by daq.begin and then then loop enters the next phase too quickly to be stopped

Possible Solution

1. Add an option to begin for doing N runs or infinite runs and handle the interrupts all together within the class. So this would look something like "daq.begin(duration=600, wait=True, num_runs='inf')". The rationale is that this is a common enough thing to want to do, so maybe it should just be a built-in. We wouldn't need a separate "daq_repeat" function in the beamline file.
2. Add an option to begin for disabling the ctrl+c handling. E.g. "daq.begin(duration=600, wait=True, handle_interrupts=False)". This would let you handle interrupts yourself if doing something more complicated than a daq.begin loop.