When setting View variables in \Phalcon\Mvc\View, an Exception is no longer thrown if `$this->_viewParam` is not already an array.
Merge remote-tracking branch 'upstream/master' into mvc-view
Fixed a variable typo in  \Phalcon\Mvc\View::render().
Fixed a variable typo in \Phalcon\Mvc\View::setLayout().
As `$layouts_dir` and `$layout_name` will always be set, it now checks if they are empty before applying the default values.
\Phalcon\Mvc\View::render() now sets `$this->_content` with `ob_get_contents()`.
\Phalcon\Mvc\View::render() now uses constants to describe layout levels.
Merge pull request #26 from SidRoberts/mvc-view

Various Mvc\View fixes