let progress steps pass along values (items produced during that step)
Merge branch 'master' of github.com:jldailey/BlingJS

Conflicts:
	plugins/promise.coffee
finalize the output so it's a string
fix a bug where mixed async arrays would ignore leading sync items
better output for:
 - null and undefined (for now, literally, possibly should suppress them)
 - numbers
add-back the few built-in types:
 - text
 - link
 - let/get
add tests for different mixing/nesting of sync/async content
scratch
rebuild
v0.2.6