Implements #223 colour based smooth, but is too simplistic

applications/reconstruct/CMakeLists.txt

applications/reconstruct/src/filters/smoothing.cu

applications/reconstruct/src/filters/smoothing.hpp

applications/reconstruct/src/ilw.cpp

applications/reconstruct/src/ilw.cu

applications/reconstruct/src/main.cpp

components/renderers/cpp/src/normals.cu

components/renderers/cpp/src/reprojection.cu

components/renderers/cpp/src/tri_render.cpp

components/renderers/cpp/src/triangle_render.cu