Concerning #794: Added support for derivatives in constructor
Concerning #794: Separated dae from augmented dae
Concerning #794: Removed fwd_via_sct option for integrator
Revert "Concerning #794: Removed fwd_via_sct option for integrator"

This reverts commit 4adf8a121b0108e7b6ce8ac42611aca9fa2ea77c.