Promise kept, theme working

* Changed theme name to "pandrah"
* Changed $e->code in the HTTP_Error exception handler to avoid mismatch
with the parent handler
* Added "included.hh" to provide default available libraries, (will
extend)
* Added commonly usable variables like $site_uri, $media_uri to class
Page and MEDIA_DIR constant to Config
* Added site_name and site_description to class Page
* Added get_nav_menu function that returns an array of menu with
children for a given "theme_location"
* Updated Theme class with removed functionally of merging theme
resources with local libs
* Added functionality for login and registeration
* Added QuickPress logos
* Updated README
* Added Bootstrap to theme
* Added a manifest.json to theme