make for loops use int64 to hopefully speed up iterations

src/maths constants.go

@@ -8,6 +8,6 @@ var e_RAT, _ = new(big.Rat).SetString("2.718281828459045235360287471352662497757
 var e ArObject
 
 func init() {
-	PI = Number(compiledNumber{PI_RAT})
-	e = Number(compiledNumber{e_RAT})
+	PI = Number(PI_RAT)
+	e = Number(e_RAT)
 }