Core Plus 2.5.5

	* [Bug] Fixed a minor glitch when /file/preview is recording its entry in the page navigation.  This
	  caused some weird redirect issues.
	* [Bug] Set /file/preview to allow reading of "asset/" files.  This is the discouraged method of
	  loading assets, but allowed.
	* [Bug] Minor bug in the HookHandler.  Did not account for type="string" returns that didn't have a
	  return value.
	* [Bug] Set the file local getFilenameHash to return a more agnostic asset path.  Now the theme name
	  is dropped as it's unnecessary.
	* [Bug] Fix in the packager to ignore filenames that end with "~".  These are backup files that are
	  not necessary.
	* [Feature] Added support for page groups under the admin menu.
	* [Feature] Set hard-mapped pages to overwrite their access strings from the component metafile upon
	  reinstallation.  This is because those pages are generally managed by the developer and not the end
	  user.