TinyMCE 4.0b3~core2

	* [Bug] Set the pop-up pages to be not recorded in page navigation.
	* [Bug] Fixed file names that are uploaded to a directory where the script may not append the
	  directory with a trailing slash.
	* [Feature] Added a new stylesheet that can be overwrote; tinymce/content.css.  This provides the
	  ability for themes to specify the site styles to be used inside of editors.
	* Rearranged the stylesheets a little