Fixes issue #464 by adding mouseout handler to document and calling mouseUp handler
Fixed notation for travis build.
Updated implementation to better pass tests, still not 100% though.
Fixed comment.
Fixed bounds of test.
Added support for pointer API so this now works in IE11.
Merge branch 'master' into issue-465
Merge branch 'issue-464' of github.com:SupplyFrame/openseadragon into SupplyFrame-issue-464
Touch-ups for #481
Merge branch 'master' into SupplyFrame-issue-464

fixed Conflicts:
	changelog.txt
Merge branch 'SupplyFrame-issue-464'