Since the attributes API is new in Rails 5, we don't actually need to keep
the behavior of `attribute :point`, as it's not a breaking change.

Clarify thread_mattr_accessor subclass behavior documentation

Add actioncable to build step for release

[ci skip]

[ci skip]

Update USAGE [ci skip]

Fix typo

Generate API doc for actioncable

Fix typo in thread_mattr_accessor doco [ci skip]

Add actioncable to list of release frameworks [ci skip]

Add thread_m/cattr_accessor/reader/writer suite of methods for declaring class and module variables that live per-thread

README.rdoc -> README.md for newly generated plugins

Kill extra newline at the start of generated manifest.js

Fix section about ApplicationRecord in upgrading guide [ci skip]

ActiveRecord -> Active Record [ci skip]

Add missing test cases for asset_path

Add thread_m/cattr_accessor/reader/writer suite of methods for declaring class and module variables that live per-thread

I think Markdown is nowadays a better default.

Pass over the ApplicationRecord changelog entry

Appliation record documentation fixes

Merge Action Cable into master

[ci skip]

This is a pass over the documentation which fills the missing gaps of
`ApplicationRecord`.

[ci skip]

Since we require you to enable it on the client-side, let us do the
same on the server-side. Then you’re not running an EventMachine unless
you need to.

The changelog entry for ApplicationRecord was a bit confusing. Thank you
guys for helping me get it in a better shape.

[ci skip]