several improvements and bugfixes

+ rework GUI
  - include a combobox for selection of visibility
  - include a checkbox wether validation should be done in the client
  - remove unused lineEdit
+ improve datatypes
+ improve tests for new descriptive data
+ metaclasse: fix overlooked read_* or write_* func's
+ improve polling
+ Introduce new ErrorClasses
+ dispatcher: use new features of datatypes + PARAMS
+ improve lib
+ autopep8
+ first working version of MLZ_entangle integration
+ split specific stuff into it's own package (MLZ,demo,ess)

Change-Id: I8ac3ce871b28f44afecbba6332ca741095426712

etc/test.cfg

@@ -11,21 +11,21 @@ encoding=demo
 
 
 [device LN2]
-class=devices.test.LN2
+class=secop_demo.test.LN2
 
 [device heater]
-class=devices.test.Heater
+class=secop_demo.test.Heater
 maxheaterpower=10
 
 [device T1]
-class=devices.test.Temp
+class=secop_demo.test.Temp
 sensor="X34598T7"
 
 [device T2]
-class=devices.demo.CoilTemp
+class=secop_demo.demo.CoilTemp
 sensor="X34598T8"
 
 [device T3]
-class=devices.demo.CoilTemp
+class=secop_demo.demo.CoilTemp
 sensor="X34598T9"