Add doc section about use outside of controllers.

See gh-98 for a discussion on this.
Update README.rdoc

Add a note about securing ActiveRecord resources by default, as an alternative to having to make sure each model is protected.
Update README.rdoc

As requested, spelling Active Record as a word, not the model.
Merge pull request #100 from bryanrite/patch-1

Update README.rdoc
Add usage example for use outside controllers
Merge pull request #99 from bemurphy/outside_controller_doc

Add doc section about use outside of controllers.
Latest release
Rack::Test::UploadedFile is a permitted scalar
Merge pull request #106 from fabiokr/rack_test_uploaded_file

Rack::Test::UploadedFile is a permitted scalar
Use info debugging level when logging
Merge pull request #104 from 3dna/info-log-level

Use info debugging level when logging
Add README section about using #permit!

Readme possibility for bullet point 2 on gh-107
Merge pull request #108 from bemurphy/permit_bang_readme

Add README section about using #permit!
Add code coloring to readme
Merge pull request #109 from soffes/master

Add code coloring to readme
Allowing arrays to be nested in numeric-key hashes

When params was of the form

    {
      :book => {
        :authors_attributes => {
          :'0' => ['William Shakespeare', '52'],
          :'1' => ['Unattributed Assistant']
        }
      }
    }

And its corresponding filter was

    {
      :book => {
        :authors_attributes => {
          :'0' => [],
          :'1' => []
        }
      }
    }

It resulted in params looking like this

    {
      :book => {
        :authors_attributes => {
          :'0' => nil,
          :'1' => nil
        }
      }
    }

This was due to the way hashes with all numeric keys are treated.
I just added a special case when a corresponding filter exists and is an empty
array.
Merge pull request #121 from simonc/121-arrays-within-a-hash

Permitting arrays within a hash
Add ruby 2.0 to travis

Runs only under rails 3.2
Merge pull request #126 from derekprior/dp-ruby2-travis

Add ruby 2.0 coverage to travis builds
Made the Rails version with whitelisting explicit

A 'later version' of Rails was described, but this confused me a little.
I just made the Rails version explicit. Whitelisting was added in Rails 3.2.