Cleaned up build process, fixed warnings.

CMakeLists.txt

contrib/sol2

include/connectivity.h

include/kernels_cpu.h

include/kernels_gpu.h

include/maxwell_interface.h

include/point.hpp

include/types.h

main.cpp

src/entity.cpp

src/entity_data.cpp

src/gmsh_io.cpp

src/kernels_cpu.cpp

src/kernels_cuda.cu

src/maxwell_common.cpp

src/maxwell_cpu.cpp

src/maxwell_kernels_cuda.cu

src/maxwell_solver.cpp

src/silo_io.cpp

test.cpp