* ENH: add an option to discretize callable sources encoding.

* ENH: allow for disallowing pickle on encoding.

* MNT: Update CHANGELOG.

* ENH: support for air brakes, controller and sensors encoding.

* STY: solve linting and style remarks.

* BUG: parachute callbacks attribute naming.

* GIT: test agg backend for matplotlib workflows.

* TST: include sensors and controllers encoding tests as non slow.

* MNT: change recursive to iterative approach on hash search.