WIP: replace all DVector related objects with gsl_vector

The use of DVector, DMatrix and friends is to be removed. The wrapping of
gsl objects is not necessary and leads to error prone code.
WIP: deprecating DMatrix, DVector and friends

Just use GSL objects internally and don't expose an API that uses them.
WIP: deprecating DVector, DMatrix and friends
WIP: deprecating DVector, DMatrix and friends.

Get dynviewer to compile
WIP: remove DVector, DMatrix and friends from dsim_trajectory
WIP: removed DVector, DMatrix and friends from dsim_trajectory.c
WIP: removed DVector, DMatrix and friends from remaining dsim_trajectory files
Remove dsim_vector and dsim_matrix. Arrange Makefile to compile at minimum functionality