Add RSS feeds support to Malone /LP, from search

[Fabián Rodríguez]

While doing advocacy and "bug helper" recruiting, I'd like to be able to show the latest X bug reports based on a search, a product, a team or an individual by syndicating/letting people subscribe to/aggregate bugs report listings from RSS feeds.

A few examples:

This search result would present and RSS icon/feed to subscribe to:
https://launchpad.net/people/magicfab/+reportedbugs?field.searchtext=&orderby=-priority%2C-severity&field.status%3Alist=Unconfirmed&field.status%3Alist=Needs+Info&field.status%3Alist=Rejected&field.status%3Alist=Confirmed&field.status%3Alist=In+Progress&field.status%3Alist=Fix+Committed&field.status%3Alist=Fix+Released&assignee_option=any&field.assignee=&field.omit_dupes.used=&field.omit_dupes=on&field.has_patch.used=&search=Search+bugs+reported+by+Fabi%C3%A1n+Rodr%C3%ADguez

The side bar titled "Latest bugs in XXXX" of any given bug report could have an RSS icon/link:
https://launchpad.net/distros/ubuntu/+source/xscreensaver/+bug/34829

This may help partially solve Bug #3067