Authoritative changelog in README.md.
- Dropped testing and official support for Rails 3.2.
- Added testing and official support for Rails 4.2.
- Added testing and official support for Ruby 2.2.1.
- Started testing Ruby 2.1.3 and 2.1.4.
- Refactoring to make code more readable (increased code climate to 4.0).
- Marked internal methods as private.
- Improved documentation.
- When cleaning params to save them as yaml, also clean each element of arrays.
- Respect the filter_parameters configuration from Rails.
- Don't crash in the presence of file uploads when reporting validation errors.
- Everything.