Reorganized the code of the provider.
Merge pull request #245 from B-Translator/master

Provider: DrupalOAuth2: Reorganized the code.
Fix #246
Merge branch 'master' of github.com:hybridauth/hybridauth
DocBlock comments improvement
Merge commit '4c90e3d0e8460d0cc983f80e815560e009e9a899'

* commit '4c90e3d0e8460d0cc983f80e815560e009e9a899':
  DocBlock comments improvement
  Fix #246
  Reorganized the code of the provider.

Conflicts:
	hybridauth/Hybrid/Storage.php