GS6004 - Writer - edits uploaded

Hi All,

I just uploaded the Writer chapter. I made a lot of changes, but most are fairly minor. Others I described in the comments with the upload.

Mainly I tried to do things:

1. Ensure that the information is accurate and current
2. Make it a bit more understandable for someone who is not already
    familiar with LibreOffice or similar programs—especially with some
    basic information about styles.

Hope that the edits are helpful, but sorry that someone (Dave?) now has to go through all of them.

Cathy