added a few comments
added a few comments

yk35/Visualization-Library,yk35/Visualization-Library,hoopoe/Visualization-Library,yk35/Visualization-Library,VizLibrary/Visualization-Library,VizLibrary/Visualization-Library,hoopoe/Visualization-Library,hoopoe/Visualization-Library,VizLibrary/Visualization-Library,VizLibrary/Visualization-Library,VizLibrary/Visualization-Library,VizLibrary/Visualization-Library