Configurable timeout for reading parameters

[NichtJens]

In a simple example like:

d = slsdet.Jungfrau(17)
d.tempvalues

There seems to be a timeout of about 2 minutes in case JF17 isn't running/connecting, upon which I get

RuntimeError: ClientSocket: Cannot connect to Detector:jf8MA-00 on port 1953

It would be great if this timeout could be made configurable.

[NichtJens]

For future reference (mostly my own, in case I need to take that route ;-) ), @erikfrojdh suggested

for host in d.hostname:
   #ping the host (os.system or similar)

for checking if the readout can work by checking if the detector is reachable.