Update dependencies
Remove planned Instapaper support
Add support for Pocket
Improvements to error handling

Catch failures and print "failed" and the exception message rather
than a full stack trace when something fails.
Fix up some twitter stuff

 - Tweetmarker stopped responding to HTTPS, so removed that
 - changed method names to pep-8 style to match the changes in twython
Remove support for Google Reader

Shut down by Google on 1/7/2013.