+++++++++++++++++ * plotting routines split in different files * curved arc parameterization and eigenvector differentials * numerical differentials as part of the LensModel core class
+++++++++++++++++ * marking version as 5 - Stable/production mode
0.9.3
+++++++++++++++++ * improvements in SimulationAPI design * improvements in astrometric uncertainty handling of parameters * local arc lens model description and differentials
0.9.2
+++++++++++++++++ * non-linear solver for 4 point sources updated * Moffat PSF for GalKin in place * Likelihood module for point sources and catalogue data improved * Design improvements in the LensModel module * minor stability updates