Prepare app for heroku deployment

Add YAML to cpanfile

Capitalize lib/Twittalytics.pm

Add namespace::autoclean to cpanfile

Fix env var access for api keys

Set production redis server url
Fix LWP SSL issue and refactor get_statuses to return error

LWP separated out HTTPS in another module. This issue came up in
production when all requests to twitter would fail, but the error would
not propogate in the logs. After discovering the solution, I added some
error handling.
Add http error handling for common_friends