review new info on file layout

[Graham Percival]

Hi guys,

I've written some more docs about file structure and writing lilypond  
files.  I've glossed over some issues in the interest of simplicity.   
Before I advertise this on -user, could a few people take a look at the  
docs?  As I said, I've glossed over some issues -- did I omit anything  
which you think is vital, or mislead people?

Sections 4.4, 4.5, 4.6:
http://lilypond.org/doc/v2.7/Documentation/user/lilypond/Putting-it- 
all-together.html

NB:  the version in 2.7.29 has some tabs instead of spaces; I've fixed  
this problem in CVS.

Thanks,
- Graham