Add new condition param to ol.control.DragBox
Make sure that the event position is correct for touch events

This is a workaround for https://code.google.com/p/closure-library/issues/detail?id=588
Merge pull request #1138 from fredj/touch_pixel

Make sure that ol.MapBrowserEvent#getPixel() always returns a valid value
Merge pull request #1137 from fredj/dragbox_condition

Add new condition param to ol.control.DragBox
Do not relay contextmenu events
Do not relay mousemove events
Use jQuery to listen to map mousemove in examples

This commit also removes the click listener, which was used for touch devices. The click listener will be added back when the lib will correctly handle clicks on touch devices.
Emulate click and dblclick on touch devices
Make overlay container stop touchend and mouseup
Vector examples display feature info on click again