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.
Updated YouTube.php
Updated Books.php
Updated Freebase.php
Updated Oauth2.php
Updated YouTubeAnalytics.php
Updated Analytics.php
Updated Urlshortener.php
Add check for uninitalized token to fix #150
Merge pull request #152 from ircmaxell/issue_150_fix

A fix for issue 150
Updated MapsEngine.php