Provide systemd files

+ move example cfg from etc/ to cfg/

Change-Id: I437b3e2aaca55539ff110f5a46e411b34e0a0b9c
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/21319
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>

cfg/cryo.cfg

@@ -0,0 +1,51 @@
+[node cryo_7]
+# set SEC-node properties
+description = short description
+	.	
+	This is a very long description providing all the glory details in all the glory details about the stuff we are describing
+
+
+[interface tcp]
+type=tcp
+bindto=0.0.0.0
+bindport=10769
+
+
+[module cryo]
+# some (non-defaut) module properties
+.group=very important/stuff
+.description=A simulated cc cryostat with heat-load, specific heat for the sample 
+	and a temperature dependend heat-link between sample and regulation.
+
+# class of module:
+class=secop_demo.cryo.Cryostat
+
+# some parameters
+jitter=0.1
+T_start=10.0
+target=10.0
+looptime=1
+ramp=6
+maxpower=20.0
+heater=4.1
+p=40
+i=10
+d=2
+mode=pid
+tolerance=0.1
+window=30
+timeout=900
+
+# some (non-default) parameter properties
+pollinterval.export=False
+
+# some parameter grouping
+p.group=pid
+i.group=pid
+d.group=pid
+
+value.unit=K
+
+# test custom properties
+value.test=customized value
+