Add request_visible_actions to authorization request to allow Moment ins...

...ertion.

Previously, Moment insertion using the Google Java client, using the access token, yielded 401 Not Authorized
Did not try using the Moment API exposed by Spring Social Google, but should work.

See 

https://plus.google.com/+SilvanoLuciani/posts/2kMX9Dzaf8V
https://gist.github.com/silvolu/5054214
https://code.google.com/p/google-api-php-client/source/diff?spec=svn533&r=533&format=side&path=/trunk/src/auth/Google_OAuth2.php

for it was fixed in the Google PHP client.