Update core (repository & portfolio) to use autoload facilities,
getting rid of not-needed-anymore requires.
Clarify a bit the readme_moodle information and expected use.
This is a bit of an ugly way of saying 'I dont support queued exports'.
The google plugins need a valid user session in order to export to the
google services, thereforce we are forcing the export to be interactive
and not queued through cron, as this wont work in the current
implmenetation.
It's possible we could add offline access to the plugins, but I don't
believe it is worth the benefit for the additional complexity.
We are disabling the plugins if not configured. As part of
this upgrade we will emailing admins about this change
if they have a plugin configured.
This is required because OAuth 2 credentials are now required
in the plugin configuration.
NOTE: These strings are temporary and need to be improved.
Updated the various plugins to use OAuth 2.0 for authentication
against google apis. Google are phasing out AuthSub and pushing OAuth as
the replacement.
This changes repository_googledocs, repository_picasa,
portfolio_googledocs and portfolio_picasa
The token for requests is now stored in session rather than a user
prefence and it persists less but doesn't bother the user more than
necessary.
The google docs portfolio plugin is converted to use resumable upload
API as this appears to be what Google have replaced this with.
Unfortunately unlike authsub OAuth will require some setup by admins,
this is linked as a docs page.
I have discovered a bug with GoogleDocs portfolio in events. An event
handler was defined in googledocs/lib.php and so the cron included just
this library. But the inclusion failed because the superclass
portfolio_plugin_push_base was not known to cron.
IMHO it is generally good habit to require_once the file which defines
the parent classes.
