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

secop_demo/test.py

@@ -0,0 +1,86 @@
+#!/usr/bin/env python
+#  -*- coding: utf-8 -*-
+# *****************************************************************************
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# Module authors:
+#   Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
+# *****************************************************************************
+"""testing devices"""
+
+import random
+
+from secop.modules import Readable, Driveable, PARAM
+from secop.datatypes import FloatRange, StringType
+
+
+class LN2(Readable):
+    """Just a readable.
+
+    class name indicates it to be a sensor for LN2,
+    but the implementation may do anything
+    """
+
+    def read_value(self, maxage=0):
+        return round(100 * random.random(), 1)
+
+
+class Heater(Driveable):
+    """Just a driveable.
+
+    class name indicates it to be some heating element,
+    but the implementation may do anything
+    """
+    PARAMS = {
+        'maxheaterpower': PARAM('maximum allowed heater power',
+                                datatype=FloatRange(0, 100), unit='W',
+                                ),
+    }
+
+    def read_value(self, maxage=0):
+        return round(100 * random.random(), 1)
+
+    def write_target(self, target):
+        pass
+
+
+class Temp(Driveable):
+    """Just a driveable.
+
+    class name indicates it to be some temperature controller,
+    but the implementation may do anything
+    """
+    PARAMS = {
+        'sensor': PARAM(
+            "Sensor number or calibration id",
+            datatype=StringType(
+                8,
+                16),
+            readonly=True,
+        ),
+        'target': PARAM(
+            "Target temperature",
+            default=300.0,
+            datatype=FloatRange(0),
+            readonly=False,
+            unit='K',
+        ),
+    }
+
+    def read_value(self, maxage=0):
+        return round(100 * random.random(), 1)
+
+    def write_target(self, target):
+        pass