Unit tests for canvas drag, release, click events

Added test for canvas-drag, canvas-release, and canvas-click events
Unit tests for canvas drag, release, click events
Unit tests for canvas drag, release, click events
Add viewportToImageRectangle method and add support to pass a point to viewportToImageCoordinates and imageToViewportCoordinates
Merge pull request #209 from msalsbery/Events-Unit-Tests

Unit tests for canvas drag, release, click events
Add comments and fix indentation
Merge pull request #212 from avandecreme/master

Add viewportToImageRectangle method
Updated changelog for #212
Changed Seajax to OpenSeadragon
Merge branch 'master' of github.com:openseadragon/openseadragon
configureFromObject uses @id