Fix #488.

Clean up the footer writer section of the preprocessor for easier reading but also fix adding and looking for --full-screen which appears to have been left off at some point.

java/test/resources/fullscreen_export.expected

@@ -0,0 +1,39 @@
+import processing.core.*;
+import processing.data.*;
+import processing.event.*;
+import processing.opengl.*;
+
+import java.util.HashMap;
+import java.util.ArrayList;
+import java.io.File;
+import java.io.BufferedReader;
+import java.io.PrintWriter;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.IOException;
+
+public class fullscreen_export extends PApplet {
+
+int x = 0;
+
+ public void setup() {
+  background(0);
+  noStroke();
+  fill(102);
+}
+
+ public void draw() {
+  rect(x, height*0.2f, 1, height*0.6f);
+  x = x + 2;
+}
+
+
+    static public void main(String[] passedArgs) {
+        String[] appletArgs = new String[] { "--full-screen", "--bgcolor=null", "--hide-stop", "fullscreen_export" };
+        if (passedArgs != null) {
+            PApplet.main(concat(appletArgs, passedArgs));
+        } else {
+            PApplet.main(appletArgs);
+        }
+    }
+}