Support AnnotatedType

Since Java 8 introduced TYPE_USE annotations, and this API is a Java standard as well, one would expect the two to work together.

I suggest JSON-B is enhanced (the implementation at least, if not the spec) to support `AnnotatedType`.

Namely, the following methods should exist:
* `Jsonb#fromJson(String, AnnotatedType)`
* `JsonbDeserializer#deserialize(JsonParser, DeserializationContext, AnnotatedType)`

The rationale is that the deserializer gains the ability to make decisions based on the type annotations.

E.g.
For a type such as `List<@Base64 Key>` it would be possible to create a (de)serializer that performs custom logic (e.g. Base64-encode/decode the value on the way in/out) for types annotated with `@Base64` regardless of their class.

No files or tests are named. Start by reviewing the Jsonb and JsonbDeserializer API definitions and determine whether support belongs in the specification, implementation, or both; done means the proposed AnnotatedType methods are defined and type annotations can guide deserialization, with tests covering the stated List<@Base64 Key> example.

Written by the indexing model from the issue text.