added README.md file to statistics_json plugin

diff --git a/statistics_json/README.md b/statistics_json/README.md
new file mode 100644 (file)
index 0000000..a4d542c
--- /dev/null
+++ b/statistics_json/README.md
@@ -0,0 +1,14 @@
+With this addon you send some information about your friendica node to the
+[the-federation.info](http://the-federation.info) page. It collects
+statistical data about building blocks of *The Federation*, the decentralized
+federated social networks (Diaspora*, ~friendica and red#matrix).
+
+The information includes
+
+* the name of your node
+* friendica version
+* registration policy
+* total number of users of that node and the active user number
+* total number of public postings
+* which plugins are activated (only Facebook, Twitter, Tumblr and Wordpress
+  will be displayed on the statistics page at the moment).