Hi,

I've made a few minor documentation changes. This is 
a bit of a rag-bag of spelling fixes, some grammar 
fixes and some fixes for logical inconsistencies (for 
example, where the docs have been changed in one 
place but not another), along with a couple of minor 
clarifications.

The only completely new bits are a brief paragraph 
about SELinux in the installation guide, and a 
pointer to the wiki for schema customisation examples 
in customizing.txt.

I hope some of these are of use!

On a different note, 
http://roundup.sourceforge.net/doc-1.0/user_guide.html#lists-of-items 
seems to be missing the screenshots, so the text 
doesn't make much sense.

Cheers,

Luke