Updated: Google themed QGIS styles for OpenStreetMap data loaded with osm2pgsql tool

I updated my initial styles so that they now work at a variety of zoom levels, especially the lower zoom levels where less detail is needed. This makes the style much more useful as it can be used when zoomed into a specific area or zoomed out to a large region. I also did some additional changes to the style to further refine its look and feel. Overall I think this update gives the style a more polished look and feel than the initial style.