Add README

Author: Loic Teixeira

README.md

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+# Summer School 2016
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+Summer School is a course in algorithms and data structures. The course is run via the [WellingtonRuby Meetup](https://www.meetup.com/WellingtonRuby) and features weekly assignments and review sessions.
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+On this repo, assignments live in separate sub-folders. Files are first commited as provided (`Add Assignment XX`), then with my solution (`Add Assignment XX Solution`) and finally the reviewed version (`Add Assgiment XX Correction`).