Conform to pep8 and pylint :

pep8 version: 2.3.1
./ConfigTreeNode.py:130:49: E231 missing whitespace after ','
./editors/Viewer.py:643:24: E128 continuation line under-indented for visual indent
./editors/Viewer.py:670:12: E221 multiple spaces before operator
./editors/Viewer.py:671:13: E221 multiple spaces before operator
./editors/Viewer.py:2138:52: E203 whitespace before ':'
./editors/Viewer.py:2139:66: W291 trailing whitespace
./controls/VariablePanel.py:154:25: E231 missing whitespace after ','
./controls/LocationCellEditor.py:88:1: W293 blank line contains whitespace
./controls/LocationCellEditor.py:191:25: E221 multiple spaces before operator
./controls/LocationCellEditor.py:200:17: E128 continuation line under-indented for visual indent

pylint 1.8.3,
************* Module controls.LocationCellEditor
controls/LocationCellEditor.py:200: [C0330(bad-continuation), ] Wrong continued indentation (add 9 spaces).
_("Selected location is identical to previous one"))
^ |
************* Module controls.VariablePanel
controls/VariablePanel.py:154: [E1601(print-statement), VariableTable.SetValue] print statement used
************* Module editors.Viewer
editors/Viewer.py:643: [C0330(bad-continuation), ] Wrong continued indentation (add 1 space).
self.GetAddMenuCallBack(self.AddNewComment))
^|
editors/Viewer.py:598: [W0612(unused-variable), Viewer.AddDivergenceMenuItems] Unused variable 'add_branch'
editors/Viewer.py:1655: [E0602(undefined-variable), Viewer.PopupConnectionMenu] Undefined variable 'variable_type'
editors/Viewer.py:1649: [W0612(unused-variable), Viewer.PopupConnectionMenu] Unused variable 'connection_type'
************* Module connectors.PYRO.PSK_Adapter

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IEC 61131-3

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===========

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    IEC-61131 is a normative document provided by the standards organization IEC

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    (International Electrotechnical Commission) and describing a standard for

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    implementing programmable controllers.

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    The part 3 of this document (commonly named IEC 61131-3) specifies syntax and 

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    semantics for programming language for programmable controllers. Beremiz

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    implements all the languages described in this document. 

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    http://www.iec.eu

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PLCopen TC6

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===========

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    PLCopen is a vendor- and product-independent worldwide association defining

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    international standards for various topics related to control programming.

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    For this purpose, PLCopen has 6 technical committees.

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    The goal of the sixth committee (TC6) is to define a standard file format, 

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    based on XML, for exchanging programmables controllers programmed using 

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    IEC 61131-3 languages. Beremiz uses this file format for saving the PLC

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    programs of projects.

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    http://www.plcopen.org

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