Add grid an onclidk on clusters

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Add reference to google librarys

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Add library of marker manager

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>
Add markers visible on determined zoon levels

Signed-off-by: Gustavo Toshi Komura <gtk10@c3sl.ufpr.br>