Implemented package imports

tests/programs/branch-or.q

@@ -1,12 +1,14 @@
+import sys
+
 main() {
 	x := 0
 
 	if x != x || x != x {
-		exit(1)
+		sys.exit(1)
 	}
 
 	if x != x || x != x || x != x {
-		exit(1)
+		sys.exit(1)
 	}
 
 	if x == x || x != x {
@@ -14,16 +16,12 @@ main() {
 			if x == x || x != x || x != x {
 				if x != x || x == x || x != x {
 					if x != x || x != x || x == x {
-						exit(0)
+						sys.exit(0)
 					}
 				}
 			}
 		}
 	}
 	
-	exit(1)
-}
-
-exit(x) {
-	syscall(60, x)
+	sys.exit(1)
 }