Changed sbt-antlr4 to a project dependency and bumped depnedency

versions.

build.sbt

@@ -6,14 +6,14 @@ description := "The second reference implementation of Mu, the micro virtual mac
 
 licenses := Seq("CC BY-SA 4.0" -> url("https://creativecommons.org/licenses/by-sa/4.0/legalcode"))
 
-scalaVersion := "2.11.4"
+scalaVersion := "2.11.6"
 
 libraryDependencies := Seq(
-	"org.antlr" % "antlr4" % "4.3",
+    "org.antlr" % "antlr4" % "4.5",
     "com.typesafe.scala-logging" %% "scala-logging" % "3.1.0",
     "ch.qos.logback" % "logback-classic" % "1.1.2",
-	"org.scalatest" %% "scalatest" % "2.2.0"
-	)
+    "org.scalatest" %% "scalatest" % "2.2.0"
+)
 	
 antlr4Settings
 

project/sbt-antlr4.sbt

 resolvers += "simplytyped.com" at "http://simplytyped.com/repo/releases"
 
-addSbtPlugin("com.simplytyped" % "sbt-antlr4" % "0.7.2")
+// addSbtPlugin("com.simplytyped" % "sbt-antlr4" % "0.7.2")
+
+lazy val root = (project in file(".")).dependsOn(sbtAntlr4Plugin)
+
+lazy val sbtAntlr4Plugin = uri("https://github.com/ihji/sbt-antlr4.git")