Using GIT to define the plugin version number

Change-Id: I9d66f18514bc2f597ea75ea80768520cf54692db

build.sbt

diff --git a/build.sbt b/build.sbt
index 8cd77dc..fe1e822 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,13 +1,14 @@
+enablePlugins(GitVersioning)
+
 val gerritApiVersion = "2.13.7"
 val pluginName = "analytics"
-val pluginVersion = "1.1-SNAPSHOT"
+
+git.useGitDescribe := true
 
 lazy val root = (project in file("."))
   .settings(
     name := pluginName,
 
-    version := pluginVersion,
-
     scalaVersion := "2.11.8",
 
     libraryDependencies ++= Seq(

project/plugins.sbt

diff --git a/project/plugins.sbt b/project/plugins.sbt
index e43b477..734a503 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,4 +1,5 @@
 logLevel := Level.Warn
 addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.4")
 addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "5.1.0")
+addSbtPlugin("com.typesafe.sbt" % "sbt-git" % "0.9.3")