cc @aroben

Suspect this api key was wrong

Enable travis to publish to npm.

Conflicts:
	package.json

Chrome will error on access to xhr.responseText when xhr.responseType is set to something other than 'text'. Everything that supports Blob should support XHR2.

* Use Blob feature detection to work with phantomjs.
* Avoid creating new promises unnecessarily.
* Fix condition for arrayBuffer test suite.

This adds a requirement for XMLHTTPRequest2 (IE10.)

Make Headers case insensitive though lowercasing.

This implementation is not case preserving when iterating over a Headers object.

Support credentials

Switch to Mocha

Closes #51