Pass the view_context to HavingAGlobalView during initialization
Pass the view_context to ViewingEntries upon initialization
Pass the view_context to presenters during initialization
Add specs for PeoplePresenter
Move html out of PeoplePresenter into partials
Pass the view_context from controler to Presenters

* Involes passing it through all involved Contexts and Presenters:
  HomeController -> HavingAGlobalView
                 -> GlobalViewPresenter
                 -> ViewingEntries
Setup specs for HavingAGlobalView with testing without full Rails stack

* This setup allows to test presenters and contexts needing a proper
  view_context without having to load the full Rails stack