* elliot/cookbook-events-mouse-scroll:
cookbook: Cleaning up grammar and wording in mouse scroll recipe
cookbook: Added more explanation about setting y coord on scrollable
cookbook: Mentioned the animation in the sample code
cookbook: Included video of the scroll example running
cookbook: Made stage slightly smaller for scroll event example
cookbook: Added video showing scrollable actor
cookbook: Added walk through of code example for mouse scroll
cookbook: Fixed link to example in mouse scroll recipe
cookbook: Simplified full scroll example
cookbook: Improved wording and formatting in mouse scroll intro.
cookbook: Handle all possible mouse scroll directions
cookbook: Build mouse scroll example with cookbook
cookbook: Cleaned up redundant comments in code example
cookbook: Added xmlns for XInclude to events docbook file
cookbook: Added basic mouse scroll recipe
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