Improvements to the beat command-line tool (migrated from github)

• Pull a configuration
• Push a configuration
• Edition/Pull/Push of descriptions associated to different objects
• Color configuration
• Check of a toolchain beat toolchain check ...
• Algorithm changes detection when running an experiment
• Check user existence in commands like: beat algorithms pull --user ADHDAHGDGAHSGHDAGHSDGH. Presently, this is silently ignored.
• While running locally, it would be nice that this package printed out more information about data input and output. It is currently very summarized.