Update exclusions

I have changed how exclusions are done. Rather than a multi-boolean if statement it now iderates over an array with the exclusions as it's positions.

src/picture_lister/Picture_Lister.java

@@ -43,17 +43,19 @@ public class Picture_Lister {
             @Override
             public boolean accept(File dir, String name) {
                if(name.lastIndexOf('.')>0) {
-               
+                  String[] exclude = {".png",".jpg"}; 
                   // get last index for '.' char
                   int lastIndex = name.lastIndexOf('.');
                   
                   // get extension
                   String str = name.substring(lastIndex);
                   
-                  // match path name extension
-                  if(str.equals(".png") || str.equals(".jpg")) {
-                     return true;
-                  }
+                   // match path name extension
+                   for (String place_holder : exclude) {
+                       if (str.equalsIgnoreCase(place_holder)) {
+                           return true;
+                       }
+                   }
                }
                
                return false;