fixes double mouse capturing after forcing variable in debug mode
this problem appears on Linux

fix bug with TextViewer instance in debug mode, appears after transferring new program on PLC
TextViewer isn't able to display debug values, so calling for this class SubscribeAllDataConsumers method causes error

fix build problem when make command have trailing whitespace(s)

whitespaces at the end are replaced with "", that causes make problem

add dialog "add program", that appears after creating new project
also, sets one task and one instance of created program in main project resource

fix i18n string selection for combobox generated from XSD

update Russian and French (Fabien M) translations
added Slovenian (Janez Pregelj) and Portuguese (Thiago Alves) translations

l18n: update messages.pot and app.fil

add l18n support to variable table in CodeFileEditor (python/C extension)

set project name and character set in generated messages.pot

close DurationEditorDialog on ENTER key

add button to ForceVariableDialog to toggle forced boolean value

Button is added only for boolean variables.

fix problem with hidden FindInPou dialog with wxPython 3.0 on Windows

FindInPou.IsShown() returned True, but dialog was hidden.
At same time On GNU/Linux with wxPython 3.0 there wasn't such problem.
So it's Windows specific.

enable non-latin variable descriptions in CodeFileEditor

fix following backtrace:

UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-7: ordinal not in range(128)
Traceback (most recent call last):
File "beremiz/editors/CodeFileEditor.py", line 610, in GetValue
return str(self.data[row].get(self.GetColLabelValue(col, False), ""))
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-7: ordinal not in range(128)

disable empty coils and contacts in LD/SFC editors

Closes #30

remove debug code