removes http helper

i'm about to add quite a few more routes, and it looks like adding
a dependency for routing will be necessary.
adds field transform stream

this thing parses a single field out of the results, and returns it
as string
adds routes dependency
use new router for input
switch output to new router
adds limit stream
adds latest and field routes
fixes limit stream
working field output
adds field stream error handling
adds the start of atom transform stream
more work on the atom stream
working atom output
adds skip stream
skip stream -> sample stream
adds sampling to http output
adds new transform streams to index.js
adds offset stream
adds offset feature and converts sample to query string param
start of sql transform stream