Support inline footnotes

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These look something like:

• [fn:: This is the inline definition of this footnote]

  A LATEX-like anonymous footnote where the de nition is given directly at the reference point.

• [fn:name: a definition]

  An inline de nition of a footnote, which also specifes a name for the note. Since Org allows multiple references to the same note, you can then use [fn:name] to create additional references.

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Closed by accident :-)

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I no longer use this module, and don't see myself implementing this.