Rename project from Speed Graph to FilterView

- Updated README and build_and_run.md to reflect the new project name: FilterView
- Renamed window title in App.java from "Speed Graph" to "Filter View"
- Completed project renaming for consistency across documentation and code

src/main/java/com/waveletsolutions/filtering/App.java

@@ -289,7 +289,7 @@ public class App extends Application {
         // Setup and display the scene
         Scene scene = new Scene(layout, 900, 600);
         primaryStage.setScene(scene);
-        primaryStage.setTitle("Speed Graph with FFT");
+        primaryStage.setTitle("FilterView");
         primaryStage.show();
     }