A collection of matchers for paperclip related Rspec'in

Examples:

describe User do
  subject { User.new }

  it { should validate_attachment_presence(:photo) }
  it { should validate_attachment_size(:photo, :in => 0..(2.megabytes)) }
  it { should validate_attachment_content_type(:photo, :content_type => %w(image/jpg image/png)) }

end

IMPORTANT NOTE

This will only work with Rails 3 or above and RSpec 2.0 or above.

TODO

Most of this is still a work in progress.