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
Merge pull request #209 from msalsbery/Events-Unit-Tests

Unit tests for canvas drag, release, click events
Merge pull request #212 from avandecreme/master

Add viewportToImageRectangle method
Updated changelog for #212
Changed Seajax to OpenSeadragon
MouseTracker original events in handlers

Implemented "Expose original event in handlers" (#23) for MouseTracker

Added OpenSeadragon.getElementOffset() method. Element-relative mouse
coordinates should be correct even if the element and/or page is
scrolled (#131)
MouseTracker Original Events in handlers

Comment & Formatting fixes
MouseTracker Original Events in Handlers

More formatting fixes
MouseTracker Original Events in Handlers

More formatting fixes
MouseTracker Original Events in Handlers

Bug fixes.  Event handler methods shouldn't be called directly in
theory...
MouseTracker Original Events in Handlers

Pass original touch events to handlers.
MouseTracker Original Events in Handlers

Misc name changes, indentation/whitespace fixes.
Still TODO: Fix documentation, evaluate presence of key handler in a
mouse tracker, evaluate whether isTouchEvent flag should be in all
eventData objects or not.
MouseTracker Original Events in Handlers

Touch events bug fix. Now uses touch object(s) properly when calculating
positions.
MouseTracker Original Events in Handlers

Renamed insideElementRelease to insideElementReleased.
Use style attributes when storing the previous elment size instead of the literal size of the element #220
Original Events in Handlers

Documentation fixes
isTouchEvent property removed from eventData where not used
'eventOrTouchPoint' var name used and 'originalEvent' var name restored
to 'event'
Merge pull request #222 from nhart/master

Use style attributes when storing the previous elment size instead of th...
Changelog for #222