#5 canonical wheat xml needs a namespace

[Mark Lentczner]

We should see:

<wheatobject xmlns="http://www.wheatfarm.com/...">

[Mark Lentczner]

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&lt;wheatobject xmlns="http://www.wheatfarm.org/
namespaces/wheatobject"&gt;

or some such. XMLWriter should always generate it. XMLReader
should have an option to assume that this is the default
namespace if missing.