TV endpoint

This is the initial commit for a TV endpoint. 

Currently implements Stöð2 and RUV endpoints on a base subset of information of what both original providers can provide. 

 - RUV has the ability to parse dates and return the TV schedule based on that. If no parameters are passed the endpoint will return todays TV schedule.
- Stöð2 endpoint does not possess the ability to parse a date because the original provider has no such methods. 
- Integration tests added.