check if the HTTP method is DELETE
fixing PPHttpConfig.php $this bug
removing deprecated thirdparty token setters
updating testcase
fixed thirdparty authorization header issue and removed deprecated methods
Merge pull request #12 from paypal/bugfix-accesstoken

Bugfix accesstoken
bugfix - Issue#15
replacing preg_replace with preg_replace_callback - issue #15
Changing class name to match file name
Merge pull request #16 from paypal/bugfix--Issue-#15-

bugfix - Issue#15
Adding client id / secret params to openid calls
Updating changelog for openid fix
Minor edits to changelog
Merge pull request #23 from paypal/openid_extraparams_fix

Openid extraparams fix
Merge branch 'master' into stable