Only force logging to STDOUT in Heroku production. It's just annoying everywhere else.
[WIP#335] Update old digest email to send monthly popular protips

Generated a protips mailer

WIP: query for popular protips directly and bypass Tire and our search implementation

Added mail_view

WIP: wiring up the popular protips

WIP: cleaning up the old weekly digest so I can merge the styles and structure

WIP: formatting a popular protip email

Re-re-add MailView

Pretty close to complete on the popular protips email
Added worker and schedule for running the popular protips emailer
Updated the popular protip email to include a message about Assembly
Restore the call to render the new relic partial
Restored the New Relic integration
Revert "Removed New Relic T-Shirt offer leftover file"

This reverts commit cc981d8dc30015a5f7969e0448de9606a288d5c0.
Conditionally display the NEW_RELIC_PROMOTION via ENV variable
Removed redundant configuration for STDOUT logging
Merge pull request #189 from just3ws/master

Updated Popular Protips emailer with New Relic promotion option