Issue with OAuth

Example : 
On Drupal if a module charge a OAuth librairy so Linkedin provider will never work.
Merge pull request #244 from Fnd-Fnk/master

OAuth if the class already exist, use the current class
Changelog entry for #244
Merge branch 'master' of github.com:hybridauth/hybridauth
Merge commit '42584cb4fd6842e009ee41dd37ced5b6039fcfcd'

* commit '42584cb4fd6842e009ee41dd37ced5b6039fcfcd':
  Changelog entry for #244
  Issue with OAuth