Check dependencies before going any further

[loic-couderc]

It can be painful to see the matam failed in final steps due to a missing dependency. Assert dependencies at the start of the pipeline:

• [x] Change the way of retrieving binaries. Use Binary class from https://github.com/bonsai-team/matam/blob/master/scripts/binary_utils.py
• check the dependencies. See if using a config file as https://docs.python.org/3/library/configparser.html can be a good solution.

[loic-couderc]

Related to #82 #83