remove dg-python binary

to be sure that the current directory is searched

[CMake] details

This reverts commit 0d0fa66c.

* as a container of the signals created with create_signal_wrapper.
* This makes them available to other entities via the pool.

This allows accessing the list of entities instanciated in the dynamic-graph.

update badges

[CI] add .gitlab-ci.yml

Correct the run_python_file command + boost 1.50 compatible + win32 compatible

Former version crashed in case of syntax error
(cf test_syntax_error.py)

This crashes for most recent versions of boost