Implement an option to choose path color. Refs #1.

src/fmri/main.cpp

@@ -60,6 +60,7 @@ int main(int argc, char *argv[])
     // Prepare data for simulations
     Options options = Options::parse(argc, argv);
     loadSimulationData(options);
+    RenderingState::instance().loadOptions(options);
 
     // Register callbacks
     glutReshapeFunc(changeWindowSize);