Modified map widget

Modified karte.html and karte.css to implement gmaps.js
Added gmaps.js under /startnext/js

Map now works over Goole Maps and pulls data about cities and numbers
of projects from http://startnext-viz.herokuapp.com/data.json
The displayMarkers function still has a major bug which causes it to
not register every city and to always display the same content in the
infobox.