transparencyint/CGIP — pull request #40 by mrflix (2012-11-14 11:12:07+00:00)
Title: F pan and zoom

- new center line indicating the center of the map
![image of the center line](http://f.cl.ly/items/3N382j1P0l1e1Q0L300T/Screen%20Shot%202012-11-14%20at%2011.59.26%20AM.png)

- restrict the user to move up above top border. So our coordination system looks like this: ⊤ it has only positiv values on the y axis going down and positiv and negativ values on the x axis (going left and right from starting at the center)

- add hand cursor to indicate that the map is draggable