Add NEWS with changes since 0.6.4
Fix NEWS.md formatting
Remove all configuration of addresses

Previously users could configure the format in which they would receive
addresses in to, from, and cc fields of Griddler::Email objects. The
options were :token, :full, :email, :name, or :hash, which was a hash of
all other options.

Configuring :token was previously deprecated, and :hash has been the
default for :from and :cc for a while now. All of these values are
pretty easy to get back with Hash#[], so we're simply removing the
configuration logic and always returning the hash, which is the most
generally useful option.
Remove unnecessary Griddler::Email#process calls

I'm not entirely sure why these were present, but the tests all pass
without the call. Probably a mistake made early on that was copied
whenever a new test was added.

Since it's not clear from this diff, #process gets the
Griddler.configuration.processor_class and sends it
Griddler.configuration.processor_method with self (the Griddler::Email
instance) as the argument.

This is the first step in moving the process logic out of
Griddler::Email and into the controller.
Move process logic out of Griddler::Email

This is controller code that shouldn't have been in a data object to
begin with.
Use instances rather than class methods

Rather than sending Griddler.configuration.processor_method to
Griddler.configuration.processor_class with a Griddler::Email as an
argument (i.e., EmailProcessor.process(email)), instantiate
Griddler.configuration.processor_class with a Griddler::Email and call
Griddler.configuration.processor_method on that object (i.e.,
EmailProcessor.new(email).process).

This encourages the behavior of separating logic into methods within an
EmailProcessor, which is better than having a single class method with
many responsibilities or passing state around between class methods.