If the setting ``site.excerpt_newline_limit`` is set to 0, then the whole string will be returned
Added Atom feed template and ``Zepto\Route\AtomRoute``
Added two new settings: ``site.author`` and ``site.author_email``
Added Atom feed template
Cleaned up ``Zepto\Route\AtomRoute``
Merge branch 'feature/add-feed-route' into develop
Cleaned up test class for ``Zepto\Zepto``