The link property of Facebook Oauth profiles no longer has a consistent
value across logins and will be completly removed in future versions of
Facebook's Graph API.

We generate a link in the old format from the id for backwards
compatibility.

Fix CouchDB query keys for PI answer stats

See merge request !86

Only enable full CORS config if a domain is specified

See merge request !85

The public CORS config was always overriden by the more generic config.
Credentials are no longer allowed to be sent with default CORS config.

Set role for admin users

See merge request !84

Setting 'security.cors.origins' did not have any effect since the the
configuration was overriden by the default path settings.

Made links relative for GitHub compatibility.

Made links relative for GitHub compatibility.

This fixes a regression caused by a change in CouchDB4J 0.8 introduced
in commit 1eaebde0. CouchDB4J 0.8+
always defaults to `reduce=false` as long as grouping is not enabled.