Move secret token to ENV

Putting it in a file like this sure is a stupid default.
Add dotenv gem

This loads your `.env` file into the Rails environment whenever you
start something up.
Add Devise gem for auth
Install Devise
Configure Devise
Fix local Postgres config

Not sure why this is required, but it fixes Rails not being able to
connect on OSX.
Merge branch 'fix_db_config' into create_users

* fix_db_config:
  Fix local Postgres config
Add RSpec and Mocha for testing
Merge branch 'fix_db_config' into use_rspec

* fix_db_config:
  Fix local Postgres config
Fix test DB config

Same as on dev.
Install RSpec

And configure it to use Mocha
Don't require Mocha from Bundler

Mocha must be loaded during spec initialization, not while the
environment loads.
Remove test/ files
Merge branch 'use_rspec' into create_users

* use_rspec:
  Remove test/ files
  Don't require Mocha from Bundler
  Install RSpec
  Fix test DB config
  Add RSpec and Mocha for testing

Conflicts:
	Gemfile.lock
Generate Devise User