wrap everything in a transform stream

[ian29]

@dnomadb ok i know inflator.js is not async, but we can come back to that. this now works they way i want.

changes

• inflator + aggregator are wrapped in a transform stream. tho i think we can pass through inflate/agg (should maybe call this inflate-stream or so?
• inflator.js is sync: json data in, geojson triangles out ( i know, i know )
• aggregator.js is still uses prototype
• aggregator.js not longer calls inflator (all the getParent + eatData logic is moved to the transform stream constructor in index.js
• the new getParent function, known creatively as agg() get called recursively until the minZ is reached https://github.com/mapbox/trizilla/blob/inflator-wrapper/index.js#L33

test

test z8 aggregated down to z5 like

$ time cat test/fixtures/fillfacets-output | node test/eater.test.js > /dev/null
real    0m5.441s
user    0m5.216s
sys 0m0.267s

:D

next

@dnomadb this PR is to better-stream but im not sure how best to incorporate your tiling work. i would love to merge this to better-stream and then better-stream to master

[dnomadb]

i would love to merge this to better-stream and then better-stream to
master

Yes, this sounds good. We can then work in the tiling logic

[ian29]

woo ok. gonna push some green buttons. then lets get your tiling work merged into master too.