[authors] Writer Guide Chapter 7 (Working with Styles) revised

[Jean Hollis Weber]

I have revised Chapter 7 (Working with Styles) of the Writer Guide, 
updated it to OOoV3.2, and submitted it for review.
http://www.oooauthors.org/english/userguide3/writer3/V_3.0_drafts/0207WG3-WorkingWithStyles_JHW_20091018.odt/view
--Jean