Grammar/content fixes for email confirmation language

- account -> email address
- was -> has been
All other text does not use camel case
Missed some "instructions about" -> for
Chase language changes in tests
Update CHANGELOG.md with missing 2.1.x minor versions

Changelog for missing entries taken from https://github.com/plataformatec/devise/blob/v2.1.4/CHANGELOG.rdoc
Merge pull request #2933 from weimeng/update-changel

Update CHANGELOG.md with missing 2.1.x minor versions
Release v3.2.4
`SessionsController#destroy` no longer yields the resource object.

If you need access to the current resource when overring the action
use the scope helper (like `current_user`) before calling `super`.

Closes #2926.
Merge pull request #2906 from p-originate/master

Grammar/content fixes for email confirmation language
Add a note about #2906 to the CHANGELOG.
Fix typo on CHANGELOG
Ensure registration controller block yields happen on failure in addition to success and closes #2936.

Now with 100% more unit tests.
Upgrade stray legacy hash syntax to 1.9 syntax.
Merge pull request #2937 from dpehrson/registrations-controller-failure-yield

Ensure registration controller block yields happen on failure in addition to success
Improve docs for update_with_password

Closes #2942
Fixed path syntax error on README.md 

Minor fix on the configuring controllers section.
Merge pull request #2946 from naveda89/patch-1

Fixed path syntax error on README.md
Fixed documentation for configured_permitted_parameters
Merge pull request #2953 from jbnunn/README_ConfiguredParams

Fixed documentation for configured_permitted_parameters
Add some spaces around the curly brackets.