= New Features

* The invalid_request_body plugin now accepts a rescue_classes
  keyword argument to give control over the classes rescued.  The
  default is still to rescue StandardError, since Rack's request body
  parsing can raise errors such as NoMethodError for invalid request
  bodies.

= Other Improvements

* Roda.opts is now an instance of Roda::RodaOpts (a Hash subclass)
  instead of an instance of Hash. Setting symbol keys via
  Roda.opts.[]= now sets class instance variables based on the key
  name. Class attr_accessors have been added for these instance
  variables in the core and plugins that ship Roda, and internal
  calls use the class attr_accessors for a significant performance
  improvement (avoiding a hash access per call). This approach was
  taken to keep backwards compatibility and simplicity while
  improving performance.

  To use this updated approach in external plugins, use the
  Roda::RodaPlugins.opt_attr_reader method to define the class
  attr_accessor methods, and switch from calling Roda.opts to calling
  the class attr_accessor methods. See the internal plugins for
  examples.

= Backwards Compatibility

* Roda has dropped support for Ruby 1.9. The minimum supported Ruby
  version is now 2.0.

* If you were modifying Roda.opts to set keys used by plugins that
  ship with Roda via methods other than #[]= (such as #merge!),
  it's possible that will no longer work as expected. Switch to
  using #[]= for such cases.

* The Roda.opts key used by the response_content_type plugin has been
  modified to fix a typo.
