Implement a variant of the Demo protocol from Markus

include LOTs of bugfixes as well

todo: documentation!

Change-Id: I52252ade34966d24990afd9672f38049882c3199

etc/demo.cfg

@@ -0,0 +1,39 @@
+[server]
+bindto=0.0.0.0
+bindport=10767
+interface = tcp
+framing=demo
+encoding=demo
+
+[device heatswitch]
+class=devices.demo.Switch
+switch_on_time=3
+switch_off_time=5
+
+[device mf]
+class=devices.demo.MagneticField
+heatswitch = heatswitch
+
+[device ts]
+class=devices.demo.SampleTemp
+sensor = 'Q1329V7R3'
+ramp = 4
+target = 10
+default = 10
+
+[device tc1]
+class=devices.demo.CoilTemp
+sensor="X34598T7"
+
+[device tc2]
+class=devices.demo.CoilTemp
+sensor="X39284Q8'
+
+[device label]
+class=devices.demo.Label
+system=Cryomagnet MX15
+subdev_mf=mf
+subdev_ts=ts
+
+[device vt]
+class=devices.demo.ValidatorTest