Build site automatically and move it to gh-pages.

[todo]

fgeo.plot/NEWS.md

Lines 15 to 20 in e94ee09

	* TODO: Build site automatically and move it to gh-pages.
	# fgeo.plot 1.1.2 ([GitHub](https://github.com/forestgeo/fgeo.plot/releases) and [drat](https://forestgeo.github.io/drat/))

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This issue was generated by todo based on a TODO comment in e94ee09 when #42 was merged. cc @maurolepore.