remove Message objects + rewrite server startup

Change-Id: Ide72fb915c3ca93c74edadd8952853508e677de7
Reviewed-on: https://forge.frm2.tum.de/review/19199
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>

etc/demo.cfg

@@ -1,13 +1,9 @@
-[equipment Equipment_ID_for_demonstration]
+[node Equipment_ID_for_demonstration]
 description = virtual modules to play around with
 
 [interface tcp]
-interface=tcp
 bindto=0.0.0.0
 bindport=10767
-# protocol to use for this interface
-framing=eol
-encoding=secop
 
 [module heatswitch]
 class=secop_demo.modules.Switch
@@ -23,7 +19,7 @@ class=secop_demo.modules.SampleTemp
 sensor = 'Q1329V7R3'
 ramp = 4
 target = 10
-default = 10
+value = 10
 
 [module tc1]
 class=secop_demo.modules.CoilTemp