MineSkin API V2 Support

3.0.1-SNAPSHOT

Add support for MineSkin V2 (#20)

2.0.0-SNAPSHOT: MineSkin Client v2 (#17)

* start on v2 client

* implement get

* implement other generate endpoints

* client builder

* use builder in tests

* move things

* implement upload tests & abstract skin types

* move client to interface

* next request getter

* fix apache client

* use revision for version

* add example

* fix skin file

* track next requests by api key

* common test executor

* compute delay & set delay on error

* null info

* use max delay

* update httpclient