tech: upgraded macaron & macaron inject, binding, session

vendor/github.com/Unknwon/com/math.go

@@ -14,11 +14,16 @@
 
 package com
 
-// PowInt is int type of math.Pow function.
+// PowInt is int type of math.Pow function. 
 func PowInt(x int, y int) int {
-	num := 1
-	for i := 0; i < y; i++ {
-		num *= x
+	if y <= 0 {
+		return 1
+	} else {
+		if y % 2 == 0 {
+			sqrt := PowInt(x, y/2)
+			return sqrt * sqrt
+		} else {
+			return PowInt(x, y-1) * x
+		}
 	}
-	return num
 }