Initialize Readme

Author: charnugagoo

README.md

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 leetcode
 ========
+
+This responsibility is a practice area for leetcode problems.
+It not only focuse on solving but also different solutions.
+
+For more
+========
+Leetcode OJ:
+http://leetcode.com/
+
+Zhenyang's Post (where idea came from):
+https://www.facebook.com/zhenyang.dai/posts/10200471134888770?comment_id=63436649&offset=0&total_comments=4&notif_t=feed_comment_reply