Add Procfile and unicorn config file for heroku
Allow Rakefile to run without rspec
Add sintara-flash to Gemfile
Allow use of different user to log internal errors
Convert elements to hashes when using pg_json/hstore

If a DelegateClass of Hash is used, pg_json/hstore won't recognize
it as a hash, and will try to turn it into an op.
Add heroku instructions to README
Ignore the db_config.rb file
Make web spec work on newer version of rack