Admin notice for IIS7 non-protected attacments
Redirect instructions for nginx and IIS7 should be dynamic
Point to the proper wiki pages for privacy info
Change display of attachments in directory list

Uses background image for "has-attachment" icon and adds icons for
attachment list (only visible at larger display sizes).
Readme
Better styling for settings table cells
Bump version numbers to 1.6.0
Add a filter on auto-generated Apache attachment rewrite rules. Props Sean Jeng
Merge remote-tracking branch 'upstream/1.6.x' into 1.6.x