- cleanup in the tutorial ordering

- started global cmakelist to compile all examples
- cleanup in the cmake building system for the tutorials

tutorial/102_DrawMesh/main.cpp

@@ -0,0 +1,16 @@
+#include <igl/readOFF.h>
+#include <igl/viewer/Viewer.h>
+
+Eigen::MatrixXd V;
+Eigen::MatrixXi F;
+
+int main(int argc, char *argv[])
+{
+  // Load a mesh in OFF format
+  igl::readOFF("../shared/bunny.off", V, F);
+
+  // Plot the mesh
+  igl::Viewer viewer;
+  viewer.set_mesh(V, F);
+  viewer.launch();
+}