Bigger + and - zoom buttons on touch devices
setHint returns new hint value
pan interactions call requestRenderFrame on dragend
Add a condition param to the KeyboardPan and KeyboardZoom interactions.

By default, the action is ignored if a modifier key is pressed.
Remove ol.interaction.Keyboard
Merge pull request #549 from elemoine/pan-interaction-fix

Pan interaction fix
Merge pull request #548 from elemoine/zoom-css

Bigger + and - zoom buttons on touch devices
Merge pull request #551 from fredj/ol.interaction.Keyboard

Remove ol.interaction.Keyboard
Merge pull request #550 from fredj/keyboard

Add a condition param to the KeyboardPan and KeyboardZoom interactions.
Add ol.DeviceOrientation