Decouple Aeolus from OWM service. Allow easy switch of services. for Aeolus

Aeolus shouldn't be coupled to one weather service. It should be possible to easily switch between services. A switch should require minimum amount of code changes. To do so, Aeolus should maintain in its memory the exact weather data required by the services. All Aeolus operations should be based on (use) those da...

Write tests for Aeolus

Write tests and make sure they pass!

Show current weather on specified city for Aeolus

The user should be able to search for a city, see a list of results (cities found) and select the city for which he would like to view the current weather data. The system should show the current weather data for the specified city.