Reorganize physics classes #33
Description
The number of physics classes is increasing, and some new user might not know where's a good place to look at. We could do:
- Reorganize folder structure, sort them more "logically" (but what is a good folder structure?)
- Give the Physics interface some methods ala
void GetDescription(string& short, string& long)(default empty) enabling nice overview output for the main executableAnt - Consistently name files after their contained physics classes, do not put more than one class into one file (for some that might create too many files)