Remove not working code
Move all overlay code from drawer to viewer
Fix crash when closing the viewer when no overlay has been added.
Fix doc in point.js
Fix imageToViewerElementCoordinates method and corresponding unit tests.
Add overlays unit tests
Add test for fixed overlay + update doc
Add deprecated drawers methods.
Fix test messages, add doc and factorize overlay object creation
Use viewer.addOverlay instead of drawer.addOverlay in collection mode
Fix style
Use minified version in tests.
Fix mistakes in doc.
Merge from master
Merge pull request #331 from avandecreme/overlays

Overlays redesign