separate number into float and integer

tests/list.ang

@@ -1,20 +1,20 @@
-list := []number
+list := []int
 
 x := 1
 while x <= 1000 {
     list.append(x)
-    assertEq(list.reduce(func(tot: number, a: number) number {
+    assertEq(list.reduce(fn(tot: int, a: int) -> int {
         return tot + a
     }, 0), x*(x + 1)/2)
 
     x = x + 1
 }
 
-func sum(a: number, b: number) number {
+fn sum(a: int, b: int) -> int {
     return a + b
 }
 
-list = []number
+list = []int
 x = 1
 while x <= 100 {
     list.append(2*x - 1)