Implement ZPA-Schedule

[Daniel-Seifert]

Description

In order to display the ZPA-Schedule in our app, we need to query upcoming events from the REST-Interface of ZPA.

Following URL shows how to receive events for one week:
https://zpa.cs.hm.edu/student/ws_get_week_plan/?date=2019-12-01

Tasks

• Implement own store-module to receive and cache calendar entries from ZPA
• Add timeline view for current day
• Add view to display all events per week