Revised CakePHP and external links on the home page
Some DocBlock improvements for Model.php
Merge pull request #2188 from ravage84/model-docblocks

Some DocBlock improvements for Model.php
Merge pull request #2189 from jameswatts/feature/home-links

Revised CakePHP and external links on the home page
Normalized associated models in unbindModel.
 Resolves #1764

 Had to cast $models to an array since ``Hash::normalize()`` doesn't support strings which ``Set::normalize()`` does (but which is deprecated).
  Reused existing tests.