Improve XDomainRequest implementation

This would help testing browser support.

removes ActiveXObject support, and improves detection of XDomainRequest.

Fixing config weirdness

Only use XDomainRequest <= IE 9

Fixing #171, don't fail on error responses with json payloads

got rid of the colon after Basic, test passed

Adding check for withCredentials in XHR adapter (#138)

Add support for baseURL parameter

Add support for HTTP Basic auth via Authorization header

Includes testing of the polyfills.

Only accept `username` and `password` as arguments

Use an `Authorization` header instead, which is a safer choice than URL embedded identities (aka...

XDomainRequest support

Conflicts:
package.json

Conflicts:
lib/adapters/xhr.js

Adding transparent decompression if `content-encoding` is set

follow redirects

Don't call slice on arguments

Don't use utils.forEach to loop over arguments

Update README.md: instantiation

Calling slice on arguments can prevent optimizations in some JS engines
(see https://developer.m...

This fixes IE8 support, where we cannot relialably detect an arguments
object.

Add support third-party library to serialize url params

Make axios instantiable

fixing http adapter WRT `responseType === 'arraybuffer'`

Don't include a process shim in the build

Update axios.d.ts, add Response.statusText