option to convert.

Closes #508, Closes #511

Closes #507

Update the documentation to say that we require the virtual attribute to be defined in order to use the validation.

Maybe I have to relearn how to read ...

This reverts commit d199e584.

Fixes GH-504. Add rails/init.rb back into repo.

Closes #68

Closes #434

Closes #389, Closes #390

Closes #213

Closes #170

added :preserve_files option so paperclip can get along with soft-delete plugins like acts_as_paranoid

Closes #152

Closes #62

Closes #105

Closes #495

Closes #133, Closes 288

Closes #214

Closes #216

Example:
  has_attached_file :image,
    :bucket => "testing",
    :path => ":attachment/:style/:basename.:extension"
    :s3_permissions => {
      :original => :private
    },
    :styles => {
      :thumb => '80x80>'
    }

The above will allow public read access on :thumb but require credentials for :original.

Example of setting default to private:
  has_attached_file :image,
    :bucket => "testing",
    :path => ":attachment/:style/:basename.:extension"
    :s3_permissions => :private
    :styles => {
      :thumb => '80x80>'
    }

The above will set all to private

Closes #398

Closes #100

Closes #388

The tests would broken for StringIO, because it doesn't have a real "path". I've modify the patch to make the test stop complaining [@sikachu]

This closes #470

Editing the readme to include information on `:hash`