Create the /astra/:date/:building/:room route for more specific querying of Astra events

Create the ```/astra/:date/:building/:room``` route that can query the list of Astra events based on the building and room. 

```/astra/:date/:building/``` fetches the list of events of a specific building on a given date

```/astra/:date/:building/:room``` fetches the list of events of specific room of building on a given date 

You can use ```events``` controllers as source of inspiration. 