H5 spartan company endpoint

[C-Kennelly]

Hey Damon! I needed access to the Company endpoints, so I thought I'd try my hand at extending HaloSharp for one of them. I've never contributed to a repo before, and this is my first time really digging into HaloSharp, so please let me know if I missed something important...

The endpoint I wanted to add was: https://developer.haloapi.com/docs/services/58acdc2e21091812784ce8c2/operations/5969689a2109180f287972a8

Here are the additions:

• PlayerAppearance (model), with a "Company" model built in.
• GetPlayerAppearance (query)
• Unit tests for GetPlayerAppearance
• Two json files for remaining unit tests.

For testing, I just modified test cases from "GetMatchResults", so it's probably not as thorough as it could be. Honestly, I'm just dipping my feet into testing.

Here's a simple classic desktop application to demo the results:
https://gist.github.com/C-Kennelly/8a339e780f75993f6700d8263ec5ff2b

Would love to have it updated in the Nuget package so I can bring it into my bigger project if it checks out!