added readme with images

Author: chrissimpkins

glyphs/u00EF-slab/README.md

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+<img src="https://user-images.githubusercontent.com/4249591/32758168-fbf0ae52-c8b0-11e7-8d3b-bc1eefa79a9b.png" height="60">
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+<img src="https://user-images.githubusercontent.com/4249591/32758169-fdbe2ee4-c8b0-11e7-99b5-5a6fadf0cdd5.png" height="60">
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+<img src="https://user-images.githubusercontent.com/4249591/32758171-fffd7a52-c8b0-11e7-94c9-e38181863257.png" height="60">
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+<img src="https://user-images.githubusercontent.com/4249591/32758175-01b7a8a4-c8b1-11e7-8bb0-c0d42a8a014b.png" height="60">