Updating release notes and documentation/download links (#137)

*Issue*: #134

*Description of changes*: Updated release notes and fixed the broken links.

build.gradle

@@ -192,10 +192,10 @@ afterEvaluate {
 
         license 'ASL-2.0'
         maintainer 'OpenDistro for Elasticsearch Team <opendistro@amazon.com>'
-        url 'https://opendistro.github.io/elasticsearch/downloads'
+        url 'https://opendistro.github.io/for-elasticsearch/downloads.html'
         summary '''
          SQL plugin for OpenDistro for Elasticsearch. 
-         Reference documentation can be found at https://opendistro.github.io/elasticsearch/docs.
+         Reference documentation can be found at https://opendistro.github.io/for-elasticsearch-docs/docs/sql/.
     '''.stripIndent().replace('\n', ' ').trim()
     }
 

opendistro-elasticsearch-sql.release-notes

@@ -1,13 +1,18 @@
+## 2019-07-31, Version 0.10.0.0 (Current)
 
-## 2019-04-19, Version 0.9.0 (Current)
+### Notable Changes
+
+* Feature [#134](https://github.com/opendistro-for-elasticsearch/sql/issues/134): Add support for Elasticsearch 6.8.1
+
+## 2019-04-19, Version 0.9.0.0
 
 ### Notable Changes
 
 * Feature [#29](https://github.com/opendistro-for-elasticsearch/sql/issues/29): Add support for Elasticsearch 6.7.1
 * Migration [#17](https://github.com/opendistro-for-elasticsearch/sql/issues/17): Migrate legacy integration tests in Maven to ES test in Gradle.
 
 
-## 2019-04-02, Version 0.8.0
+## 2019-04-02, Version 0.8.0.0
 
 ### Notable Changes
 
@@ -16,7 +21,7 @@
 * Bug fix [#10](https://github.com/opendistro-for-elasticsearch/sql/issues/10): Return friendly error message instead of NPE for illegal query and other exception cases.
 
 
-## 2019-03-11, Version 0.7.0
+## 2019-03-11, Version 0.7.0.0
 
 ### Notable Changes