Sticker orientation for abstract patterns

[Orion Pobursky]

Ok, you're right, we've never actually put out formal guidance so here it is:
- Per the spec, sticker patterns should be oriented so that top is aligned with +Z axis.
- Top is defined as either the logical top of a picture, text, etc. or, in the case of more abstract patterns, what the top is when the sticker is applied.
- When in doubt, sticker should be oriented such that X value is greater that Z