Add items to TODO

TODO

@@ -20,3 +20,9 @@
   Test on Linux's /proc/sys/kernel/hostname
 - Ruby-like Process#detach (is that possible?)
 - stderr isn't flushing on exit
+- Pull constants output process.
+- ReadStream should not use an offset in calls to fs.read
+  (so that it can pull in files larger than 2G)
+- fs.readFile and fs.readFileSync need to not stat and prealloc a buffer 
+  based on size but rather read until EOF into a chain of buffers, then 
+  concat them together.