Scml

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* CI using Github Actions
* consolidating tests outside src directory
* Adding advanced script and upgrading negmas
* removing unnecessary init function from simulator
* showing shorter names in tournament run results

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* documentation update (specially the scripts section)
* Adding a --gui option to scml CLI to run it as a simple GUI
* Simplifying the parameters of SCML CLI by keeping only the onese that
do not conflict with the default parameters used in the competition
* adding a script call scmladv.py which keep all the detailed parameters
used earlied in SCML.

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* Documentation update
* Adding trading_strategy_init/step functions.
* Correcting a bug in n_competitors_per_world.
* allowing control of the number of participants per simulation explicitly in scml2020
* [SCML2020] Activating negotiation step quota
* [Doc] Adding a tutorial about logs and stats
* correcting the display in scml run2020
* removing the docs from the package to save space

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* [testing] correcting a test to ignore system agents when checking for
bankruptcy
* [minor] Reformating using Black
* [bugfix] Resolving a but in the CLI tournament command that prevented it from
running with default parameters

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* [Documentation] Removing inherited members to make the documentation easier to
follow
* [CLI] Improving the display of run2020 command

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* [speed] improvement in tournament running
* [bugfix] handling very short simulations