add: images.findImage; change images.findColor implementation to opencv

common/src/main/java/com/stardust/util/IntentExtras.java

@@ -43,6 +43,7 @@ public class IntentExtras implements Serializable {
 
     private IntentExtras(int id) {
         mMap = extraStore.get(id);
+        extraStore.remove(id);
         mMaxId = id;
     }
 

common/src/main/java/com/stardust/util/Nath.java

@@ -0,0 +1,16 @@
+package com.stardust.util;
+
+/**
+ * Created by Stardust on 2017/11/26.
+ */
+
+public class Nath {
+
+    public static int min(int... ints) {
+        int min = ints[0];
+        for (int i = 1; i < ints.length; i++) {
+            min = ints[i] < min ? ints[i] : min;
+        }
+        return min;
+    }
+}