Added support for NewsCategory API - Get all and get by id methods
Added support for Create/Update/Delete News Category
Added UnixDateTime.cs for more intuitive time conversion. Support for NewsItems Get All and get by category id
Added support for get news item by id and delete news item
Added support for Create/Update News Item
Added tests for UnixDateTime.cs
Added support for News Subscribers (GET/UPDATE/CREATE/DELETE)
Support for News Item Comments added
Added support for troubleshooter categories
Added support for Troubleshooter Steps (GET ALL/GET/DELETE)
Added support for CREATE/UPDATE troubleshooter steps
Troubleshooter comment support added