MapView Everywhere wót Tim

This extension will display a map view for every website:
- This extension will collect all city names from the page the user is viewing.
- This extension will display a table with all the found cities and how many times the city name occured.
- This extension will display a will display a map whit markers on all the found cities.
- When clicking the maker on the map or the list entry the browser will navigate to the part of the page where it was found, the surrounding element will also turn yellow.
- When clicking on one of the cities the user is also able to switch between the multiple occurences.