put the new matrix implementation in place

src/core/CMakeLists.txt

@@ -5,8 +5,8 @@ set(hdrs
     include/pw/core/core.hpp
     include/pw/core/math.hpp
     include/pw/core/matrixbase.hpp
-#    include/pw/core/matrix.hpp
-#    include/pw/core/vector.hpp
+	include/pw/core/matrix.hpp
+	include/pw/core/vector.hpp
 #    include/pw/core/quaternion.hpp
 #    include/pw/core/serialize.hpp
     include/pw/core/image.hpp
@@ -14,7 +14,7 @@ set(hdrs
     include/pw/core/rect.hpp
     include/pw/core/size.hpp
     include/pw/core/timer.hpp
-#    include/pw/core/mesh.hpp
+	include/pw/core/mesh.hpp
     include/pw/core/globals.hpp
     include/pw/core/image.hpp
     )
@@ -23,7 +23,7 @@ set(srcs
 #    src/buffer.cpp
     src/image.cpp
     src/debug.cpp
-#    src/mesh.cpp
+	src/mesh.cpp
     src/core.cpp
 #    src/serialize.cpp
     src/timer.cpp