Allow . in ia identifier when used in /ia/$identifier URLs.
Fixed a typo.
Added "Go to read section to download" link for screen readers. #189
Using span instead of h6 for displaying edition metadata. #189

They are not really headers and mislead screen readers.
Added "Go to the editions section to read or download ebooks" link on works page for screen readers. #189
Added search link on the top of the page for screen reader. #189