Add Triangle Sticker

[bengl]

Circle stickers were nixed in #1 due to inefficient space usage. Triangles, on the other hand, tesselate just fine.

2.54cm sides would allow some cool interactions with hexagon stickers, but I thought these might be far too small to be of any use. Went with 5.08cm.

[terinjokes]

Anyone know of any examples of triangle swag of around this size?

[iancrowther]

The io.js (moon) logo

[junosuarez]

I don't know of examples of stickers that have already been printed, but I would be +1 to making and using triangular stickers

[xdumaine]

I'd suggest removing the requirement triangle stickers must be oriented with a vertex at the top. Without that requirement, stickers could alternate in orientation in order to tesselate to fill an entire area.

[iancrowther]

We have sent this to diginate as a proof of concept https://github.com/lnug/lnug.github.io/tree/master/assets/stickers/official

A print template is under construction via @maxwellito and @tancredi

[iancrowther]

can we merge this?

[terinjokes]

@iancrowther probably not, as a result of working I'm doing to resolve #13

[iancrowther]

np