Sample Analytic Vector Tile output

[echeipesh]

Connects: https://github.com/azavea/osmesa/issues/28

We should generate sample vector tile output to get early integrations testing and iteration going.

Use: s3://osm-pds-tmp/ that were generated by Seth.

Expected Output:

• Vector tiles at zoom level 12
• All features go into a single vector tile layer named all
• Feature tags contains created, modified, version, and type fields.
• Features contain, highways, waterways, buildings

Some geometries may not represented in the layer and modified tag may need to be mocked. I don't believe it can be correctly generated with current vectorpipe code

[mojodna]

FYI, I've used the basis of #27 to produce historical geometries for the whole world. Last time took ~40 minutes on a 256 node cluster of m3.2xlarges. (updated is the equivalent of modified, I think)

Vector tiles are another can of worms; the global set of geometries contains some that result in the clipToGrid stage running indefinitely.

[echeipesh]

I see you already have intermediate geometries saved too. In that case we should re-define this task to generate VT from that and debug/deal with clipToGrid.