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/cryo.cfg

@@ -5,6 +5,7 @@ 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]
 interface=tcp
 bindto=0.0.0.0
@@ -18,7 +19,7 @@ encoding=demo
 # some (non-defaut) module properties
 .group=very important/stuff
 # class of module:
-class=devices.cryo.Cryostat
+class=secop_demo.cryo.Cryostat
 
 # some parameters
 jitter=0.1