hex sticker to dos

[njtierney]

• Adjust contrast between gray text and orange background
• Add hex sticker to website
• Add hex sticker as a favicon to the website
• print the hex sticker! :)

[imkemayer]

@njtierney: The template as well as several image formats (png, jpg, pdf) for the hex sticker can now be found in the static/images/ folder. If you need the template under another format I could try to convert the Keynote file.