- Minimap usability : mouseup and mousemove events are now plugged on
document.body instead of the minimap's controller. This way the user can
move his mouse outside the container to keep moving the map's frame.
Also the mouseup information is no longer lost if it occurs outside for
the minimap.
- Added MinimapController that displays a frame on the animated preview
when zoomed in
- Added bounds for the offset to make sure it doesn't go crazy
- Added new utility Math.js with a minmax function
- TODO : the minimap controller has a lot of dependencies, see if could be
cleaned up
- TODO : DrawingController knows the size of the picture it has to render
only indirectly, which makes it hard in some cases (such as boundary
checking performed during setOffset)
