Adding Jackson databind module for simplified deserialization.

[aweigold]

This commit adds compile only dependencies to Jackson databind, to provide simplified deserialization of ua_parser models for consumers using the library.

As this is compile only, no impact is expected to consumers not using Jackson. However by including this boilerplate code, Jackson now can deserialize directly into ua_parser models in projects that may have stored them previously.

[bpossolo]

nice solution to using Jackson without muddying your the models w Jackson annotations

[aweigold]

@bpossolo I submitted this over a year and a half ago... I'm probably not going to get to changes requested. Feel free to modify and take the code as you wish. :smile: