ES 5.5.1 upgrade

Author: mbok

README.adoc

@@ -167,7 +167,7 @@ matrix which matches your Elasticsearch version and use the download link for th
 
 [source]
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-./bin/elasticsearch-plugin install https://github.com/scaleborn/elasticsearch-linear-regression/releases/download/5.5.0.1/elasticsearch-linear-regression-5.5.0.1.zip
+./bin/elasticsearch-plugin install https://github.com/scaleborn/elasticsearch-linear-regression/releases/download/5.5.1.1/elasticsearch-linear-regression-5.5.1.1.zip
 ----
 The plugin will be installed under the name "linear-regression".
 Do not forget to restart the node after installing.
@@ -176,6 +176,7 @@ 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/5.5.1.1/elasticsearch-linear-regression-5.5.1.1.zip[5.5.1.1]        | 5.5.1 | Jul  27, 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