Preface fixes

[rhattersley]

Tidy-up syntax and clarify revision history status.

Closes #14.

[rhattersley]

@JonathanGregory, @davidhassell, @rsignell-usgs, @marqh - if we can merge this PR and the other recent PRs I've raised we will have addressed all known issues ... exciting times!

[marqh]

exciting times!

exciting indeed

this one is fine, it now matches the current 1.6 doc

[rhattersley]

Thanks @marqh

[JonathanGregory]

It looks lovely - thanks very much and well done. Is there a way to make a PDF of it, so I can print it out nicely and sit down with it and the existing PDF to compare them side-by-side?

I noticed one thing in the preface: the link is out of date. http://www-pcmdi.llnl.gov/cf/ should be replaced with http://cfconventions.org/.

Best wishes

Jonathan

[rhattersley]

I noticed one thing in the preface: the link is out of date

Yes - I spotted that but left it alone to respect the existing DocBook version. If you're happy for it to be updated then I can apply the quick fix. Or you might like to click on the pencil icon for pr01.adoc (with the tool-tip text "Fork this project and edit the file") which will let you modify the text and create a new pull request all in the browser.