Added gem badge

README.md

@@ -1,3 +1,5 @@
+[![Gem Version](https://badge.fury.io/rb/fluent-plugin-logzio.svg)](https://badge.fury.io/rb/fluent-plugin-logzio)
+
 Logz.io plugin for [Fluentd](http://www.fluentd.org)
 =============
 With fluent-plugin-logzio you will be able to use [Logz.io](http://logz.io) as output the logs you collect with Fluentd.
@@ -32,4 +34,4 @@ If you absolutly must, use the non-buffered plugin (we really recommend using th
 ## Parameters
 * **endpoint_url** the url to Logz.io input where `xxx-xxxx...` is your Logz.io access token, and `my_type` is the type of your logs in logz.io
 * **output_include_time** should the appender add a timestamp to your logs on their process time. (recommended)
-* **output_include_tags** should the appender add the fluentd tag to the document, called "fluentd_tag"
+* **output_include_tags** should the appender add the fluentd tag to the document, called "fluentd_tag"