Update docs and requirements to django-1.5.x.
Get the RSS entry GUID from the guid element defined in RSS 2.0.
If the guid element is not available, use an md5 hash of the contents.
Previously an md5 hash of the link element was used but some non-conforming
feeds do not make the link element unique for each entry (and the spec
does not require it).
Syntax error; try putting the comment elsewhere.
Drop an md5 checksum calculation from an explicit GUID field in the feed entry.
Adjust guid for posts to use an md5 checksum of the post title if the guid
field is not provided. If the title is empty, use an md5 checksum of the
actual content instead. Previously an md5 checksum of the post link
was used but links may not be unique; for example, a feed may not
have separate permalinks for each post so will point back at the main site.
Check for duplicates using (feed, guid) pair as defined in the post model.
Previously (url, guid) was being checked which could lead to an
integrity error.
Catch additional exceptions when inserting posts. Previously only
duplicate values were caught and other exceptions caused the
program to exit.