bartaz/impress.js — pull request #439 by TristanV (2014-11-09 12:48:27+00:00)
Title: Adding a mouse wheel event listener  to impress.js

Adding a mousewheel event listener to move from step to step
Adding also a function setCaptureMousewheelEvents(truefalse) to activate this listener from your code.

Example to activate in your impress presentations :
impress().init();
setCaptureMousewheelEvents(true);

If you accept this pull request, feel free to reformat the versioning and authoring data at the top of the file.