Capture error and throw exception on Stream fopen
Merge pull request #198 from ianbarber/master

Capture error and throw exception on Stream fopen
Updated Calendar.php
Updated Analytics.php
Adding an experimental AppIdentity auth impl

Included an example file. It's a tricky one to unit test as
there's not a lot to it, and it only works on GAE!
Fix style issues
Merge pull request #201 from ianbarber/master

Add experimental appidentity option
Updated YouTube.php