Added SphinxSearch library

README.md

 * [Elastica](https://github.com/ruflin/Elastica) - A client library for ElasticSearch.
 * [Solarium](http://www.solarium-project.org/) - A client library for [Solr](http://lucene.apache.org/solr/).
 * [SphinxQL query builder](http://foolcode.github.io/SphinxQL-Query-Builder/) - A query library for the [Sphinx](http://sphinxsearch.com/) search engine.
+* [Sphinx Search](https://github.com/ripaclub/sphinxsearch) - Sphinx Search library provides SphinxQL indexing and searching features
 
 ## Command Line
 *Libraries related to the command line.*