abstracted solver routine to base class, created option for screen output, introduced solver postprocessing. Done for SN Pn and MN

added absolute path variable for tests folder to allow arbitrary binary placement; CTest now shows errors in case of failure; fixed all KiT-RT compiler warnings

renamed solver to KiT-RT and adjusted all scripts to the new name; reworked CMakeLists by e.g. adding CTest to allow unit tests by "make test" (unit test binary will be placed in the build dir now); moved all non-category source files to toolboxes; fixed some compiler warnings

now ignores pycharm project files

mn and pn dont compute analytical solution in iterations where it does not get written to vtk anymore

added option for scatter coeff for linesource. added compatibility factor for rad flux output and ic for moment solvers

linesource analytical solution avail for no scattering. Option is called ANALYTIC. linesource analytical with scattering started. Analytic output implemented for MN solver