Prepare 5.5.0.1 release

Author: mbok

README.adoc

@@ -176,7 +176,8 @@ Do not forget to restart the node after installing.
 [frame="all"]
 |===
 | Plugin version | Elasticsearch version | Release date
-| https://github.com/scaleborn/elasticsearch-linear-regression/releases/download/5.3.0.1/elasticsearch-linear-regression-5.3.0.2.zip[5.3.0.2]        | 5.3.0 | Jul  16, 2017
+| https://github.com/scaleborn/elasticsearch-linear-regression/releases/download/5.5.0.1/elasticsearch-linear-regression-5.5.0.1.zip[5.5.0.1]        | 5.5.0 | Jul  18, 2017
+| https://github.com/scaleborn/elasticsearch-linear-regression/releases/download/5.3.0.2/elasticsearch-linear-regression-5.3.0.2.zip[5.3.0.2]        | 5.3.0 | Jul  16, 2017
 | https://github.com/scaleborn/elasticsearch-linear-regression/releases/download/5.3.0.1/elasticsearch-linear-regression-5.3.0.1.zip[5.3.0.1]        | 5.3.0 | Jun  30, 2017
 |===