Update changelog
Rename to The Old Reader Notifier
Improved `findOurTab` code using `chrome.tabs` API
(Note that www.theoldreader.com domain isn't really needed)
Code cleanup
Inject observer into tabs open at startup
Orphaned content scripts now self-deregister
Added links to preferences page

Added "Notifier" to Readme.md and preferences page title
Updated changelog
Bumped version
Fix Readme line breaks

(traditional Markdown is so traditional)