Feature/th16 content

[lukasthaler]

This PR implements the new game features that came with the th16 update:

• hero equipment:
  • an Equipment class w/associated holder to allow parsing hero equipment from the API response
  • a cached Player.equipment property and player.get_equipment-method. The return values from either of thesewill be enriched with game data if enabled
  • Hero.equipment to display the equipment currently equipped on a hero. Equipment instances obtained this way will not be enriched with game data no matter the settings
• the new Root Rider troop and Spirit Fox pet
• the ClanMember class now has a th level property