Kernel factory simplified

fixed a bug (velocity bc) changed cuda architecture for Mollok-Cmake file (cmake error) simplified kernel factory to simplify adding new kernels

CMake/cmake_config_files/MOLLOK.config.cmake

+#################################################################################
+# VirtualFluids MACHINE FILE
+# Responsible: Martin Schoenherr
+# OS:          Windows 10
+#################################################################################
+
+#SET TO CORRECT PATH:
+SET(BOOST_ROOT  "D:/libraries/boost_1_74_0"  CACHE PATH "BOOST_ROOT")
+SET(BOOST_LIBRARYDIR  "D:/libraries/boost_1_74_0/stageMSVC64VS2019/lib" CACHE PATH "BOOST_LIBRARYDIR")
+SET(CMAKE_CUDA_ARCHITECTURES 52)
+
+SET(PATH_NUMERICAL_TESTS "E:/temp/numericalTests/")
+LIST(APPEND VF_COMPILER_DEFINITION "PATH_NUMERICAL_TESTS=${PATH_NUMERICAL_TESTS}")