allow to omit fingerprint duplication check
generate fingerprint when dup-omitted
always test checksum duplication
configurable item limit in feeds
subdomain usernames show only items from that user

closes #54
needs more testing, and cookies need to change
fixed subdomain parsing and redirection
revert a change where uniq dimensions are shown
readded /show/nsfw page
refactoring of image storage and carrier lib

needs further work with thumbnails(480) and a migration script
fix some wrong asset urls
fixes json rendering
some polish, integrate 480 thumbnails
single item page, same height for all in grid
single item view with tags
fixed bug in refactored carrier thumbnail code
stylesheet: removed some margin in wrapper/containers
single item links in gallery, next/prev with thumbs
make embedding size adjustable
website screenshot posting: first version
make titles in gridview clickable