Applied patches to tag 1.6.0

* driverdan#82 Case insensitive headers

* driverdan#96 Use withCredentials
* driverdan#101 Fix depreciated license field
* driverdan#112 Status 0, add error and abort events
* driverdan#115 Support null protocol

Add jshintrc, npmignore, style cleanup, sync fixes, additional tests

Add LICENSE, add support for redirects, bug fixes

Add disableHeaderCheck, don't use connection pooling

Bump version number

Remove User-Agent from banned headers

Set Content-Length: 0 on POST with no data

Release 1.4.0

Add support for loading local files via file:// protocol
Add removeEventListener, dispatchEvent, better event handling, support for additional events

Version 1.3.0