Update all @deprecated annotations

to adhere to the `@deprecated <version> <description>` format, where version and description are mandatory.

Inspired by the discussion https://github.com/cakephp/cakephp/pull/4417#discussion_r16957099

Related specs:
http://phpdoc.org/docs/latest/references/phpdoc/tags/deprecated.html
http://phpdoc.org/docs/latest/references/phpdoc/tags/version.html