This week, I finalized the project terminology. Now, the most important parts that define the framework are called Base Parts. Using the base parts, everybody can create Prototypes - the reusable parts with particular purpose. The projects are supposed to be assembled using Base and Prototype parts. If a part is modified and has low potential of reusability, such a part is called a Custom Part. 

Also, added the first prototype for robots with two motorized wheels

You can find the prototype used in one of the documentation pictures (the project itself will be later)

The updates are already in the repo:

•  https://github.com/an-dr/simpleR