put todo items into readme instead of posix module comment block

Readme.org

@@ -482,10 +482,50 @@ Note: this section only tracks the state of incomplete TODO items. Having everyt
 
 ** TODO Pre-alpha tasks
 - Shell module
-  - See todo steps in posix.rs
+  - circuit casts int to bool automatically
+  - pipe control flow construct
+  - l and load functions for binaries, call for scripts
+  - load-to-string function
+  - ignore job control signals (if needed)
+  - background processes
+  - be able to list all background processes with j function
+  - be able to fg a bg process
+  - be able to bg and fg process (ctrl z?)
+  - changedir/cd
+  - pwd
+  - call-with (let style fd redirection)
+  - Documentation!
 - logging library
 - make const all the error messages
-
+- make presentation on relish
+  - lisp basics
+    - s expressions
+    - data structures
+  - control flow
+    - let, circuit, etc
+  - homoiconicity
+    - quote/eval
+    - lambda
+  - putting it all together
+    - CI tests
+    - repl configuration
+  - self documenting
+    - env
+    - help
+  - beyond lisp
+    - POSIX
+      - ergonomics of control flow as shell command
+      - circuit -> pipe
+      - let -> call-with
+      - putting it all together
+        - job control in shell
+        - shell scripts
+    - To infinity and beyond
+      - NGINX modules
+      - bootable?
+  - give a pretty pastel white, pink and blue theme
+  - store in repo after giving presentation
+        
 ** TODO alpha tasks
 - Can pass args to relish scripts (via interpreter)
 - Can pass args to relish scripts (via command line)