Updated AndroidPublisher.php
Added service Dns.php
Added service QPXExpress.php
Updated Analytics.php
Remove duplicate lowercase QpxeExpress.php
Merge pull request #136 from tagged/remove-dupe-qpx-class

Remove duplicate lowercase QpxeExpress.php
Use refresh token when revoking access if available

Previously we would only ever use the access token, which may have expired.
Now, use the refresh token preferentially if present.
Use single quotes on $ sign

Avoids potential issue on older PHP. Fixed #128
Fixing collection to use new private modelData
Merge pull request #138 from ianbarber/master

Fixing token revoking and change URI template quoting
Set a default value for array and map types
Added service MapsEngine.php
Removed Mapsengine.php
Correct a Typo, it's WordPress.
Updated AdExchangeBuyer.php
Updated Doubleclicksearch.php
Updated Analytics.php
Merge pull request #145 from dd32/master

Correct a Typo, it's WordPress.
Updated MapsEngine.php
Prevent PHP warnings if creation/expiry dates not known for access token

If $client->setAccessToken() is called with a token that was not obtained via this SDK, then later operations which call Google_Auth_OAuth2::isAccessTokenExpired() cause 2 PHP warnings. This check prevents those warnings.

The use case for using a token obtained from elsewhere is when migrating to this SDK from another solution, where a request token is stored and you don't want the user to be forced to re-authenticate upon an upgrade.