Reverse the order of posts in XML feed.

Also fix the MIME type for the <link>.

Remove unnecessary checks in blogServer.serveNode

Get the server port by calling the method, not taking its address.

Parse option flags in ReadBlog, so that the server or writer errors o…

…ut early.

Do not re-open the file in isUpToDateInternal.

Update the README.md

Remove RunAsServer and change the poll time to 30s

Updates for Go1 not done by `go fix`.

README tweaks