Initial commit for #37. Preview image support, combined two classes into one, refactored image source.
diff --git a/sample/src/com/davemorrissey/labs/subscaleview/sample/extension/ExtensionCircleFragment.java b/sample/src/com/davemorrissey/labs/subscaleview/sample/extension/ExtensionCircleFragment.java
index 737ddc7..bc4dab2 100644
--- a/sample/src/com/davemorrissey/labs/subscaleview/sample/extension/ExtensionCircleFragment.java
+++ b/sample/src/com/davemorrissey/labs/subscaleview/sample/extension/ExtensionCircleFragment.java
@@ -22,6 +22,8 @@
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.ViewGroup;
+
+import com.davemorrissey.labs.subscaleview.ImageSource;
 import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView;
 import com.davemorrissey.labs.subscaleview.sample.R.id;
 import com.davemorrissey.labs.subscaleview.sample.R.layout;
@@ -44,7 +46,7 @@
             }
         });
         SubsamplingScaleImageView imageView = (SubsamplingScaleImageView)rootView.findViewById(id.imageView);
-        imageView.setImageAsset("squirrel.jpg");
+        imageView.setImage(ImageSource.asset("squirrel.jpg"));
         return rootView;
     }