add changelog in README

Author: petitphp

README.md

@@ -18,4 +18,19 @@ This plugin add two new type of sources for your facets, Posts to Posts (P2P) co
 
 1. Unpack the download-package.
 2. Upload the files to the /wp-content/plugins/ directory.
-3. Activate the plugin
+3. Activate the plugin
+
+## Changelog
+
+### 2.1.0 (Nov 10, 2017)
+
+* New filter `facetp2p_p2p_index_params` : Change the data generated for a post when indexing a P2P connexion
+* New filter `facetp2p_p2pmeta_index_params` : Change the data generated for post when indexing a P2P metas
+* Fix some coding standards
+
+### 2.0.0 (Oct 19, 2017)
+
+Complete rewrite of the plugin. Now directly hook into FacetWP sources list instead of adding a custom facet.
+
+* Add support for P2P connections in FacetWP sources
+* Add support for P2P connection metas in FacetWP sources