Forgot the += instead of = in the demo code - this made trapezoidal wark oddly. Fixed
minor changes in the demo code for DAE integration
Containers of ChLink objects are std::vector now, like other containers for ChBody and ChPhysicsItems.
This is not only to have a more uniform code, but also to allow a better support for OpenMP in future, un Update() loops.
Refactoring "Eulero" into "Euler"
Euler linearized implicit - it is like the Anitescu DVI, except it computes delta speed not new speed
Merge branch 'develop' of https://github.com/projectchrono/chrono into develop