Implemented package imports

examples/factorial/factorial.q

@@ -1,5 +1,7 @@
+import sys
+
 main() {
-	syscall(60, factorial(5))
+	sys.exit(factorial(5))
 }
 
 factorial(x) {

examples/fibonacci/fibonacci.q

@@ -1,5 +1,7 @@
+import sys
+
 main() {
-	syscall(60, fibonacci(10))
+	sys.exit(fibonacci(10))
 }
 
 fibonacci(x) {

examples/hello/hello.q

@@ -1,11 +1,9 @@
+import sys
+
 main() {
 	print("Hello", 5)
 }
 
 print(address, length) {
-	write(1, address, length)
-}
-
-write(fd, address, length) {
-	syscall(1, fd, address, length)
+	sys.write(1, address, length)
 }