Refact(README): Adds third party libraries (#164)

Author: rashidsp

README.md

@@ -152,3 +152,50 @@ rake spec
 ### Contributing
 
 Please see [CONTRIBUTING](CONTRIBUTING.md).
+
+### Credits
+This software incorporates code from the following open source projects:
+
+**Httparty** [https://github.com/jnunemaker/httparty](https://github.com/jnunemaker/httparty)  
+Copyright © 2008 John Nunemaker  
+License (MIT): [https://github.com/jnunemaker/httparty/blob/master/MIT-LICENSE](https://github.com/jnunemaker/httparty/blob/master/MIT-LICENSE)
+
+**JSON Schema Validator** [https://github.com/ruby-json-schema/json-schema](https://github.com/ruby-json-schema/json-schema)  
+Copyright © 2010-2011, Lookingglass Cyber Solutions  
+License (MIT): [https://github.com/ruby-json-schema/json-schema/blob/master/LICENSE.md](https://github.com/ruby-json-schema/json-schema/blob/master/LICENSE.md) 
+
+**Murmurhash3** [https://github.com/funny-falcon/murmurhash3-ruby](https://github.com/funny-falcon/murmurhash3-ruby)  
+Copyright © 2012 Sokolov Yura 'funny-falcon'  
+License (MIT): [https://github.com/funny-falcon/murmurhash3-ruby/blob/master/LICENSE](https://github.com/funny-falcon/murmurhash3-ruby/blob/master/LICENSE) 
+
+
+### Additional Code
+This software may be used with additional code that is separately downloaded by you.  _These components are subject to
+their own license terms, which you should review carefully_.
+
+**Bundler** [https://github.com/bundler/bundler](https://github.com/bundler/bundler)  
+Copyright © 2008-2018 Andre Arko, Engine Yard, et al  
+License (MIT): [https://github.com/bundler/bundler/blob/master/LICENSE.md](https://github.com/bundler/bundler/blob/master/LICENSE.md)
+
+**Coveralls** [https://github.com/lemurheavy/coveralls-ruby](https://github.com/lemurheavy/coveralls-ruby)  
+Copyright © 2012 Wil Gieseler    
+License (MIT): [https://github.com/lemurheavy/coveralls-ruby/blob/master/LICENSE](https://github.com/lemurheavy/coveralls-ruby/blob/master/LICENSE)
+
+**Rake** [https://github.com/ruby/rake](https://github.com/ruby/rake)  
+Copyright © 2004-2017 Jim Weirich  
+License (MIT): [https://github.com/ruby/rake/blob/master/MIT-LICENSE](https://github.com/ruby/rake/blob/master/MIT-LICENSE)  
+
+**RSpec** [https://github.com/rspec/rspec](https://github.com/rspec/rspec)  
+Copyright © 2009 Chad Humphries, David Chelimsky  
+Copyright © 2006 David Chelimsky, The RSpec Development Team  
+Copyright © 2005 Steven Baker  
+License (MIT): [https://github.com/rspec/rspec/blob/master/LICENSE.md](https://github.com/rspec/rspec/blob/master/LICENSE.md)  
+
+**RuboCop** [https://github.com/rubocop-hq/rubocop](https://github.com/rubocop-hq/rubocop)  
+Copyright © 2012-19 Bozhidar Batsov  
+License (MIT): [https://github.com/rubocop-hq/rubocop/blob/master/LICENSE.txt](https://github.com/rubocop-hq/rubocop/blob/master/LICENSE.txt)
+
+**WebMock** [https://github.com/bblimke/webmock](https://github.com/bblimke/webmock)  
+Copyright © 2009-2010 Bartosz Blimke    
+License (MIT): [https://github.com/bblimke/webmock/blob/master/LICENSE](https://github.com/bblimke/webmock/blob/master/LICENSE)
+