Attempt to fix selector memeory leak. Add update checker

common/src/main/java/com/stardust/pio/PReadableBinaryFile.java

@@ -0,0 +1,10 @@
+package com.stardust.pio;
+
+/**
+ * Created by Stardust on 2017/4/6.
+ */
+
+public class PReadableBinaryFile extends PFile {
+
+
+}