Removed redundant #open declaration on courier system setting form.
Removed non-existant validation function for template collection list element.

Added capability to delete template collections from settings page.
Added descriptions to Courier System emails.

Fixed CourierContextInterface not extending base config interface.
Fixed missing 'jquery.form' dependency for template_collection_list.
Fixed errors occurring when no operations are supplied for tempalte collection list element.

Added a controller for displaying a template form of a template collection. The form will automatically create a template if it does not exist.

Added configuration for Semantic UI.
Added generated menu and segment stylesheets from Semantic UI.
Added build instructions for Semantic UI into README.

Created a courier.template_collection_list library.

Fixed #8
Follow up tasks can be found in #11

Courier Message Composer allows the user to send a single message to a single recipient using the normal courier message queue.

Added bypass queue permission. (Not implemented, see #10)
Added channel entity type ID paramconverter.
Added permission generator for each channel x identity type combination.
Added compose access checker. Checks for any identity types in any or all channels.

Fixed missing identity token on form displays for template collections without a context.

Fixed #9

Courier System intercepts Drupal account mails and replaces them with Template Collection.
There is currently no UI for editing the template collections. (WIP)
Templates for each template collection can be discovered via database inspection.

Added common token operations trait for Template Collections and Templates (ChannelInterface implementors)
Added methods to add token options. (options are passed to \Drupal::token->replace())
Added globally available token types on email form. Used when contrib token.module is unavailable.

#7

Fixes previous commit.

Added test for this.

Make context optional for TemplateCollection.

Added return value for CourierManager::sendMessage()

Added remaining interface documentation for MessageQueueItem entity.

Added module settings form.
Added communications menu group.
CourierManager will now log if no messages were generated for an identity.

Added message queue item entity.
API changed, all channels implementations require an update.
Added ChannelFailure exception for failed message transmission.
Added MessageQueueItem entity.
Changed purpose of ChannelInterface::applyTokens
Added ChannelInterface::isEmpty
Messages are still sent immediately, this will be removed shortly.
Email fails fatally if no email address is set.

Fixed #6

Fixed #5

Courier manager handles template related actions.
Added isTemplate helper to Identity Channel manager.

Added abstract channel base class.
Email entity extends channel base class.

Added options parameter to IdentityChannelManager::sendMessage()
Changed method ChannelInterface parameter type hinting

Added getIdentityTypes method to identity channel manager.

Ensures token values are set before sending message.

Identity token applies automatically to messages.
Fixed a PHPdoc issue.
Changed token list to inline.

Tokens can are added template collection, and applied when a template is chosen.
Tokens are exposed on template forms.
A nice token UI is used on template forms if contrib token.module is available.

Courier now has a dependency on Dynamic Entity Reference.
Added terms and model to README.md
This commit closes issue #1

Added IdentityChannel plugin, and IdentityChannelManager service to support it.
Added courier_email entity type and channel.
Added IdentityChannel plugin supporting Drupal user to courier_email.