Version 1.0.0

Add a variant of the race track system for 1/64 to 1/76 scale RC cars.

This variant can be fully printed, barriers and ground included. It still comes with a modular approach, each element being able to be printed separately. Full tiles can also be printed all at once (barriers + ground).

Regarding the changes impacting the whole project:

• The structure and the config have been unified, common config is available at the top level.
• The script files also got unified, with support added for post-processing scripts.
• Readme files are provided with details for each variant.

Pull requests:

• Feature/Update camelSCAD to v1.0.1 by @jsconan in #16
• Feature/scale 64 race track by @jsconan in #17
• Fix/scale 24 render config by @jsconan in #18
• Release 1.0.0 by @jsconan in #19

Full Changelog: 0.5.0...1.0.0