added threadguid column to nfitems table in database
rename threadguid to origin
add origin to microblog table
add origin to river json using guid if none found
add origin detection to microblog page
add origin detection to blog post cgi
adjust argument order
add origin pass-through to rss feed
source the origin element in the river template
extract origins from incoming feed items
change xpath in is_reading_list() to double slash