test
Revert "test"

This reverts commit 8dc852059a74d53263a79d9cc038a5d96748867d.
1st modification of navigation

Added a class VTNavigationHandler largely based on
MouseNavigationHandler but with some modification on:
-"_handleMouseWheel" to zoom toward mouse position
-"_handleMouseMove" and "_handleMouseUp" to reverse the rotation
And added:
-"_handleContextMenu" if we want to do something with right click
Paning Modifications

- The panning part of _handleMouseMove is now based on the clicked lon
lat so it will always stay under mouse cursor
- Added some customized cursor when panning, rotating...
Panning amelioration
Ignore .DS_Store while committing

I need that so GitHub won't ask me about those files everytime I commit
Right click + keyboard

- Right click and moving to zoom like on GE (a little bit jerky)
- Keyboard handler like on GE too (largely based on
KeyboardNavigationHandler)
Split and rename class + more keyboard handler

- Now the VTNavigationHandler is split in two class with better names:
GoogleMouseNavigationHandler and GoogleKeyboardNavigationHandler
- Keyboard navigation can now handle shift arrow to rotate
- Keyboard handler support more keys like zqsd, space ...
some comments
Merge pull request #3 from VisioTerra/navigation

Google Earth like navigation