Add pg gem in production, for Heroku
Remove duplicate migration

For some reason I thought this column needed to be added. It was already
added in a previous migration, so this migration should not have been
existent in the first place.
Add feature to import the default events
Add some files that were forgotten along the way

These poor files have been forgotten to be committed with their brother
files.
Fix deleting-the-active-tournament bug

Also shuffles around some configuration for paperclip so that things
work in dev without an s3 bucket needing to exist.