Merge pull request numpy#290 from rossbar/toc-add-short_titles

Author: bsipocz

content/mooreslaw-tutorial.md

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+short_title: Moore's Law
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content/save-load-arrays.md

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+short_title: Sharing Array Data
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content/tutorial-air-quality-analysis.md

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+short_title: Analyzing Air Quality
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content/tutorial-static_equilibrium.md

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+short_title: Static Equilibrium
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content/tutorial-style-guide.md

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+short_title: Style Guide
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content/tutorial-svd.md

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+short_title: Linear Algebra on n-D arrays
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