note - considering swapping ch. 1 and ch. 2

co-ordinating I/O is more fundamental, and doesn't write a single module (so no reliance on first chapter)

@aruntnadar first draft done, ready for review (can you add the editorial label when you begin to review)

please review as outline in #1 (comment) (ch. 1 also needs to be reviewed in new described method)

2-Coordinating-IO.pdf
@davidmarkclements : Chapter 2 has been reviewed. As mentioned before, address the comments once we are done writing all the chapters. However, you can refer to the comments.
Do let me know in case you didn't understand any of the comments.