Describe the big picture of your changes here to communicate to the maintainers why we should accept this pull request:
Updating this guide to match the minor changes to the curriculum in the Fall 2016 version.
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Modified EK 4.2.1B
Updated to reflect changes made to the final AP-CS curriculum framework
Removed the text 'We are currently updating these guides to match the…
… minor changes to the curriculum
in the Fall 2016 version.' since we made the updates.
I'll have a proper look at this later this week, but looks great from a quick glance.