These revisions focus mainly on improving language, presentation, and
organization. The core instructions are largely preserved, though some
new information and links to other resources are added.
Now that we have a user forum in addition to qubes-users, it makes more
sense to link to /support/ than to link directly to qubes-users (or to
the forum, for that matter). This layer of redirection means allows us
to update just one thing (namely, the /support/ page) instead of having
to hunt through all the documentation every time support information
changes.
I have added most of Marek's suggestions. I don't know how to solve the markdown HTML and formatting issue. (I believe alert boxes are great and should be used to make it more visually appealing but alas, it may be a bit too late to settle on this)