Dev import kml

This pull request add th Input KMl component. 

This component has the following capabilities:

Firefox & Chrome & IE 10:
 - Display a local KML file
 - Display a KML file downloaded from a URL  
 - Drag'n'drop a file directly on the map
 - Link to validate your KML file 

Firefoy & Chrome:
 - Drag'n'drop a URL or an HTML link on th map
   
IE 9:
 - Display a KML file downloaded from a URL
 - Link to validate your KML file 


On all browsers the component is displayed on a popup draggable, open by a link under the "Map Tools" section


For this I've done 4 majors modifications:

- Modify the app.mako-dot-conf to add the possibility to call the ogcproxy service with a relative URL
- Create a BrowserSnifferService to allow detection of browser version
- Create a draggable directive available in its component folder with an example of use
- Create the Import KML component with an example