Editing Chapter 1#29538

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bors merged 3 commits intorust-lang:masterfrom

steveklabnik:ch1_edits

Nov 5, 2015

Commits on Nov 3, 2015

Make some edits as per No Starch.
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Commits on Nov 4, 2015

Merge first three chapters into one.
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Commits on Nov 5, 2015

Fixes as per @brson's review
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