Merge pull request #456 from SpineEventEngine/v0.9.0-release

Bump the framework version to 0.9.0.

Author: Alex Tymchenko

build.gradle

@@ -33,7 +33,7 @@ buildscript {
         guavaVersion = '20.0'
         protobufGradlePluginVerison = '0.8.0'
 
-        spineVersion = '0.8.41-SNAPSHOT'
+        spineVersion = '0.9.0'
 
         //TODO:2016-12-12:alexander.yevsyukov: Advance the plug-in version together with all
         // the components and change the version of the dependency below to