Update authors.

AUTHORS.md

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+Original code:
+
+ - http://code.activestate.com/recipes/577686-bloom-filter/
+ - Author: Sundar Srinivasan
+
+Forked into SVN Repo:
+
+ - http://stromberg.dnsalias.org/svn/bloom-filter/trunk/
+ - Author: Daniel Richard Stromberg
+
+Forked to GitHub, renamed to `bloom_filter`:
+
+ - https://github.com/hiway/python-bloom-filter
+ - Author: Harshad Sharma