New meshing backend "stl2" which can handle the situation with surfaces belonging to more than one objects. I.e. flush surfaces. This is done by setting the GEOM_SENSE_2 tag in the h5m-file
Add a new experimental imprinting/merging routine
Added more test-routines including neutronics on a set of test models
Speed optimization of merging routine (courtesy of @sjcrs )
Feature freeze PR Introducing some new features