Merge pull request #32 from porsager/patch-1

Make nodeClientResponse unenumerable to allow for stringification of the data object.
exclude underscored fields when making data "javascripty".
Move processKeys function creation out of request
Don't exclude fields with javascript
Merge pull request #33 from porsager/patch-1

Move processKeys definition out of the request closure
update install for makefile
Merge pull request #35 from twilio/update-makefile

update install for makefile
Merge remote-tracking branch 'upstream/master' into timeout_option