Fixes #8930 - Incorrect html caused a typo on the trends page

Refs #8857 - Styling fixes for coreOS boot_files_uri

fixes #8857 - refactor Debian boot_files_uri into parent class to match CoreOS

Fixes #8838 - Replace HTTP error codes with human-readable symbols

refs #6832 - prevent extraction of string interpolation

Fixes #8764 - adds description to taxonomies

fixes #8484 - make SmartProxyAuth concern more useful to plugins

fixes #8802 - add Turbolinks support

Fixes #8837 - Return correctly formatted response on ajax_error

Fixes #6832 - Don't show location/organization on host edit page if host has none