Made onUpgrade non-final. This method can be safely overridden if

developers want to bypass the file based upgrade logic. Closes #1

Author: jgilfelt

core/src/com/readystatesoftware/sqliteasset/SQLiteAssetHelper.java

@@ -300,7 +300,7 @@ public final void onCreate(SQLiteDatabase db) {
 	}
 
 	@Override
-	public final void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 
 		Log.w(TAG, "Upgrading database " + mName + " from version " + oldVersion + " to " + newVersion + "...");