[Validation] Add "hasser" support
Add "versionadded" directive for 2.5
fix "versionadded" wording
[WIP][Valiadtor] - EmailConstraint reference
Use of Sphinx markup
Version added and clarifications
Link moved and heading updated
Typo and link label
Lowercase and link label
CS
Blank line restored
Describe retrieval of StopwatchEvent
Documentation for the new Uuid constraint
List the UUID constraint in the reference section
Fix formatting issues
[Console] Adding use cases to command as service

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.4+
| Fixed tickets | N/A

Command as a service can be useful to give access to services and
configuration parameters in the `configure` method.

A simple use case: you want to allow the user to set an option's default
value in the `app/config/parameters.yml` file. Or the default value
needs to be computed by  a service (database retrieval for instance).

With a `ContainerAwareCommand`, this wouldn't be possible because the
`configure` method is called from the constructor, so the container
isn't set yet.
Took @WouterJ's advices into account
Fixed typos spotted by @cordoval
Added @lsmith77 and @dbu use cases
Created a new article