Club.sync_callink_groups with rspec tests

- fixed reverse order of CALLINK_API_KEY and CALLINK_APP_ID in
Callink::Organization.search
- xml files have no personal information
TODO: speed up tests
only sync callink orgs if response status is OK
change callink API url from https to http protocol

using https led to some issues with SSL, but the API just support HTTP

Errno::ECONNRESET (Connection reset by peer - SSL_connect)
http://stackoverflow.com/questions/15966446/errnoeconnreset-connection-reset-by-peer-ssl-connect
helper methods for a club to get facebook events

Currently only supports club with facebook pages
Also add scopes to query clubs with facebook_id, facebook_url, or
callink_id