Fix vector examples
Merge pull request #1648 from elemoine/1648

Vector examples are broken
Assert that an element is removed in ol.structs.RBush#remove_
Fix test description
Replace faulty iterative ol.structs.RBush#remove with less faulty recursive version
Return, and check, boolean value from ol.structs.RBush#remove indicating whether value was removed
Move remove from ol.structs.RBush to ol.structs.RBushNode
Icon images are handled by a separate class
Fix the kml format tests
Vector renderer uses new image style interface
Vector image source uses new image style interface
Introduce an icon image cache
Use the icon image cache
Add ol.renderer.Map#scheduleExpireIconCache
Use ol.renderer.Map#scheduleExpireIconCache
Factor out icon image loading code
Remove a FIXME
Add tests for ol.renderer.vector
Add tests for ol.style.IconImageCache
Merge pull request #1590 from elemoine/icon

Infinite loop on icon loading