vimeo plugins not working

The signatuare call to backend must have changed at some point and
requires 'config' as a parameter
Query to ES in the analytics plugin needed to be updated (not sure it is
correct though)
autoload standard config in backend if no config specified
patch made obsolete by recent commit on source repo
Merge pull request #15 from arnaudlimbourg/master

update ES query in vimeo plugin for ES > 1.0