Release 1.6.0

Features

• Added new SEE-I model for Ar+ bombarding different types of metal
• Background gas: Extension to polyatomic molecules and gas mixtures
• Boris-Leapfrog time integration for PIC (Poisson)
• Delete specified products after a chemical reaction

Improvements

• Regression tests for MCC and background gas routines
• h5piclas2vtk: Automatic output of DG_Source if it is available

Fixes

• Fix of inner boundaries in combination with an open boundary
• Fix in h5piclas2vtk for VisuParticles=T
• Fix particle time integration analytical initial conditions
• Fix in the nearest neighbour search in DSMC