readme: screen options.

README.md

@@ -341,6 +341,13 @@ The screen on which every other node renders.
   to ncurses).
 - __forceUnicode__ - Force blessed to use unicode even if it is not detected
   via terminfo, env variables, or windows code page.
+- __input/output__ - Input and output streams. `process.stdin`/`process.stdout`
+  by default, however, it could be a `net.Socket` if you wanted to make a
+  program that ran over telnet or something of that nature.
+- __term__ - `TERM` name used for terminfo parsing. Set to the `$TERM` env
+  variable by default.
+- __title__ - Set the terminal window title if possible. Corresponds to the
+  `title` property mentioned below.
 
 ##### Properties: