Make versions available in maven central (#77)

build.sbt

@@ -28,11 +28,11 @@ scalaVersion := "2.10.5"
 crossScalaVersions := Seq("2.10.5", "2.11.7")
 
 // Requires 0.8.2 or later and https://github.com/druid-io/druid/pull/1940
-val druid_version = "0.9.1-SNAPSHOT"
+val druid_version = "0.9.1.1"
 // This is just used here for Path, so anything that doesn't break spark should be fine
 val hadoop_version = "2.4.0"
 // Requires a patch for https://issues.apache.org/jira/browse/SPARK-11016
-val spark_version = "1.6.1-mmx0"
+val spark_version = "1.6.1"
 val guava_version = "16.0.1"
 val mesos_version = "0.25.0"