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/epics.cfg

@@ -17,23 +17,23 @@ framing=eol
 encoding=demo
 
 [device tc1]
-class=devices.demo.CoilTemp
+class=secop_demo.demo.CoilTemp
 sensor="X34598T7"
 
 [device tc2]
-class=devices.demo.CoilTemp
+class=secop_demo.demo.CoilTemp
 sensor="X39284Q8'
 
 
 [device sensor1]
-class=devices.epics.EpicsReadable
+class=secop_ess.epics.EpicsReadable
 epics_version="v4"
 .group="Lakeshore336"
 value_pv="DEV:KRDG1"
 
 
 [device loop1]
-class=devices.epics.EpicsTempCtrl
+class=secop_ess.epics.EpicsTempCtrl
 epics_version="v4"
 .group="Lakeshore336"
 
@@ -43,14 +43,14 @@ heaterrange_pv="DEV:RANGE_S1"
 
 
 [device sensor2]
-class=devices.epics.EpicsReadable
+class=secop_ess.epics.EpicsReadable
 epics_version="v4"
 .group="Lakeshore336"
 value_pv="DEV:KRDG2"
 
 
 [device loop2]
-class=devices.epics.EpicsTempCtrl
+class=secop_ess.epics.EpicsTempCtrl
 epics_version="v4"
 .group="Lakeshore336"