Look for the api_key in $_COOKIE rather than $_REQUEST.

For Mr. Reader, we set a cookie on the login message and then look for
it on subsequent requests. We need to check $_COOKIE rather than
$_REQUEST though as the values in $_REQUEST are set within php.ini and
cookies are not often set there since the PHP org changed the default
setting of "request_order" to be "GP".
Minor improvements to the README
Merge pull request #3 from akrabat/fix-mr-reader-auth

Look for the api_key in $_COOKIE rather than $_REQUEST. Fix for Mr.Reader
Merge pull request #4 from akrabat/readme-updates

Minor improvements to the README
updated version
Revert "updated version"

This reverts commit 180592d391bd24389ef63e1eff5d88695ed1e546.
Revert "Revert "updated version""

This reverts commit 95f76a8269ab045be904c2944f4ae9b6817f8474.
updated version