Add support for `@ParamConverter` in `LinkRequestListener`

The `@ParamConverter` annotation, and other request variable modifying
annotations are often used in REST APIs.
Most, if not all, of those annotations hook on to the
`kernel.controller` event to do their jobs.
By emitting such event in the `LinkRequestListener`, the arguments to
the controller are modified, and the developer does not have to care
if their actions are called by this listener, or from an external request.
Merge pull request #11 from vierbergenlars/patch-1

[Feature] Add support for @ParamConverter in LinkRequestListener