Fix invalid python3 syntax

Syntax checking using python3 ...
Python 3.7.2+
File "./connectors/PYRO/__init__.py", line 76
except Exception, e:
^
SyntaxError: invalid syntax

Syntax error in ./connectors/PYRO/__init__.py
File "./connectors/PYRO/PSK_Adapter.py", line 40
except ProtocolError, x:
^
SyntaxError: invalid syntax

Syntax error in ./s.py
File "./runtime/Worker.py", line 67
raise _job.exc_info[0], _job.exc_info[1], _job.exc_info[2]
^
SyntaxError: invalid syntax

Exclude pyjslib.py from python3 syntax correction check

pyjs doesn't support python3 and it's unmaintained.
async is a new keyword introduced in python 3.7.

./tests/tools/check_source.sh
Syntax checking using python3 ...
Python 3.7.2+

Syntax error in ./runtime/Worker.py
File "./svgui/pyjs/lib/pyjslib.py", line 24
def import_module(path, parent_module, module_name, dynamic=1, async=False):
^
SyntaxError: invalid syntax

revert occasionally committed changed first_steps project.

project was changed by commit:
update translations from https://www.transifex.com/beremiz/beremiz-ide (756d02cf78db)

Merged in masterschlumpf/beremiz/generate-button (pull request #38)

"Generate Prgram" button

Approved-by: Andrey Skvortsov <andrej.skvortzov@gmail.com>

Create a "Generate Program As..." menu to make the "Generate Program" toolbutton even more useful.

The behaviour is the same as "Save" and "Save As...". Now "Generate Program" uses the last filename
if known and "Generate Progam As..." asks every time.

Add "Generate Program" to toolbar in PLCOpenEditor standalone mode.

Currently you can find the "Generate Program" action only in the file menu,
but this action is very often used in standalone mode, so I added toolbuffon.

Merged search in CTN branch

Finished adding search in python and C files. Stripped debug code and useless comments. Close branch

WIP adding searching capabilities in python files. was done :
- added search in body of Code File Tree Nodes (moved editor code so that we CTN search can have the same sections text layout as editor to search in)

WIP adding searching capabilities in python files. was done :
- added search in global variables used by Code File Tree Nodes

WIP adding searching capabilities in python files. was done :
- fixed highlighting search result in text body of CTN code editor.

WIP adding searching capabilities in python files. was done :
- change stub search results to trigger highlighting un variable panel
- trying to highlight in CTN code file editors -> problem with EditorPanel not having self.VariableEditor set...
- added highlight capability to CTN's CodeFileEditor's VariablePanel

WIP adding searching capabilities in python files. was done :
- fixed stub CTN search results so that they can be accepted by search result panel
- worked on search result panel so that it can display those CTN results
- made search result panel display correctly stub search result, for variables and body matches
- EditProjectElement now opens CTN node as well as PlcOpen project nodes

WIP adding searching capabilities in python files:
- Added recursive Search capability to config tree nodes
- Added stub search to code editors, for test

Fixed more pylint reports :
connectors/__init__.py:31: [W1652(deprecated-types-field), ] Accessing a deprecated fields on the types module
in fact, it should have been unused import.

Long due merge