* aGrUM
* Add `gum::Potential::sign` and `gum::Potential::new_sign`
* Bug fix in causalImpact found by Musfiqur Rahman
* Generalization and rationalization of access of aGrUM's generator of pseudo-random values
* Adding `gum::Timer::toString()`.
* Improving BN random generator.
* get rid of `sprintf` as much as possible.
* Fixing random seed.
* Fixing `gum::Potential::random()` : not a distribution.
* Updating *Fast* syntax : enumerating consecutive integers (e.g `{1|2|3|4}`) creates a `gum::RangeVariable[1,4]` rather than an `gum::IntegerVariable{1|2|3|4}`.
* pyAgrum
* Add `pyAgrum.Potential.sign` and `pyAgrum.Potential.new_sign`
* Bug fix in causalImpact found by Musfiqur Rahman
* Adding `pyAgrum.Timer.__str()__`.
* Improving BN random generator.
* Fixing random seed.
* Fixing `pyAgrum.Potential.random()` : not a distribution.
* Adding access to `gum.fastVariable()`.
* Updating *Fast* syntax : enumerating consecutive integers (e.g `{1|2|3|4}`) creates a `pyAgrum.RangeVariable[1,4]` rather than an `pyAgrum.IntegerVariable{1|2|3|4}`.
* add a new module to export in different formats (for now just GML).