Added a simplified ascii_to_int() implementation.

Removed dependency on hard-coded pager id. Pager id is now passed
as an environment string `pagerid' to tasks. Alternatively, this
could take space in the utcb of each task.

conts/test/main.c

@@ -1,16 +0,0 @@
-/*
- * Main function for this container
- */
-#include <l4lib/arch/syslib.h>
-#include <l4lib/arch/syscalls.h>
-#include <l4/api/space.h>
-
-extern int print_hello_world(void);
-
-int main(void)
-{
-	print_hello_world();
-
-	return 0;
-}
-