Cleanup Development

Added 'development setup' instructions to the README.md.

Added "rake whitespace:all" -- replaces tabs with spaces, removes extra spaces and newlines.

Replaced db/seed.rb with Ruby Seed-fu gem.

Added config/database.yml.sample and config/application.yml.sample.

Removed the previous Stardust::Application.config.secret_token and setup as a ENV variable.

Ran the whitespace rake task.