put todo items into readme instead of posix module comment block

src/stl/posix.rs

@@ -26,28 +26,6 @@ use std::process::{Command, Child, Stdio};
 use nix::unistd;
 use ctrlc;
 
-/* WONTDO: flag, switch
- * Step 6: ? function
- * Step 7: pipe control flow that circuits across a list of calls hooking stdin to stdout
- * Step 8.1: load=binary script=call
- * Step 8.2: call-to-string function
- * Step 9: ignore job control signals
- * Step 10: background processes
- * Step 11: Be able to list all background processes with j function
- * Step 12: Be able to fg a bg process
- * Step 13: Be able to bg an fg process (Ctrl Z)
- * Step 14: changedir
- * Step 15: pwd
- * Step 16: circuit casts int to bool automatically
- * Step 17: Documentation
- *   - list functions and their docstrings
- *   - examples of pipe and circuit
- *   - job control
- * Step 18: call-with
- *   - let style setting of files as stream targets
- *   - and of course documentation
- */
-
 pub struct ShellState {
     pub parent_pid: unistd::Pid,
     pub parent_pgid: unistd::Pid,