Add installer for quick setup and easy use
Change :no-commit option to :commit so that by default rake tasks are not run
Add Quick Start to README and change --skip-model-creation option to --create-user.  By default, no User model will be created.
Add option to choose belongs_to relationship with roles
If --user-belongs-to-role, change role_symbols code and add belongs_to :role in user.rb
Add documentation for --user-belongs-to-role option and remove old portion of installer.
Merge pull request #1 from zeiv/decl-auth-installer

Installer for decl_auth