Upgrade exception_notification and reactivate
Set ruby version in Gemfile; add rails_12factor

Silences Heroku deploy warnings
Fix Heroku asset precompilation
Use sendgrid for email
Additional validations
Drop histories table
Really dying for specs
Restrict production logging to :warn
Use 5 unicorn workers
Don't specify :bcrypt, silences devise warning
Add posts_count counter cache; post eagerloading; dependent destroys
J/K we don't require users
Add pagination, show 20 threads per page
Use local images for error pages