add host object check to fix serialization of File/Blobs etc as json

when the content-type is json
Release 0.14.2
add browser field to support browserify

Allows for superagent to be used with browserify (or other browser field
compatible packaging tools).
Merge pull request #217 from shtylman/browser

add browser field to support browserify
Release 0.14.3
Revert "add browser field to support browserify"

This reverts commit e7857a3a1974d3874cb5c0413d32a9519ad13dda.
update emitter-component
update qs
change some test ports
add superagent.js build output
remove build
Release 0.14.4
add flag to ensure the callback is __never__ invoked twice
refactor
Release 0.14.5
fix HEAD unzip bug
Release 0.14.6
Listen and forward the error event of the unzip stream.
When listening for the error event attach the error handler "fn" to both streams (unzip and response).
Merge pull request #231 from lbdremy/handle-unzip-error-event

Handle unzip error event