Merge pull request #298 from SpineEventEngine/0.8.0-update

Advance version to `0.8.0`.

Author: Oleksii Tymchenko

build.gradle

@@ -33,10 +33,10 @@ buildscript {
         guavaVersion = '20.0'
         protobufGradlePluginVerison = '0.8.0'
 
-        spineVersion = '0.7.24-SNAPSHOT'
+        spineVersion = '0.8.0'
         //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 `spineVersion` defined above.
-        spineProtobufPluginVersion = spineVersion
+        spineProtobufPluginVersion = '0.7.24-SNAPSHOT'
     }
 
     dependencies {