Update full screen API.
Fix fullscreen test on IE11
Merge branch 'master' of https://github.com/openseadragon/openseadragon into fullscreen-inputs
Remove ActiveX for IE<11. Update changelog.
Remove useless parameter Element.ALLOW_KEYBOARD_INPUT
Add support for old webkit. Add fullScreenApi.getFullScreenElement method. Remove old license.
Merge pull request #358 from avandecreme/fullscreen-inputs

Update full screen API.