refactor: prefix article filenames with their date

randogoth.com/content/20080816_city-17-street-art.md

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+Title: city 17 street art
+Category: ENDTIMES
+Date: 2008-08-16 11:53
+Slug: city-17-street-art
+Tags: endtimes, geeksauce, games, art, english
+Thumb: /library/c17posters.jpg
+
+the epic 3d
+[fps](http://en.wikipedia.org/wiki/First-person_shooter)-[rpg](http://en.wikipedia.org/wiki/Role-playing_game_(video_games))
+[half life 2](http://orange.half-life2.com/) had the most realistic an
+nicely made street art spread across [city
+17](http://en.wikipedia.org/wiki/City_17). if you liked it as much as i
+did, [here is a zip
+file](library//hl2_street_art.zip)
+with all graffitis, [pochoirs](http://en.wikipedia.org/wiki/Pochoir) and
+posters from the game, extracted from the original
+[.vtf](http://developer.valvesoftware.com/wiki/VTF) files as tga images
+including alpha channels. enjoy.
+
+this is my favorite stencil of the
+[g-man](http://en.wikipedia.org/wiki/G-Man_(Half-Life)) in the rain. it
+only appears once. i don't remember where it was - somewhere underground
+[city 17](http://en.wikipedia.org/wiki/City_17)…
+
+![gmanstencil.png](/library/c17gman.png "gman")