fix up build.sbt and add gitignore

groundtest/.gitignore

@@ -0,0 +1 @@
+target

groundtest/build.sbt

@@ -1,10 +1,10 @@
 organization := "edu.berkeley.cs"
 
-version := "1.2"
+version := "1.0"
 
 name := "groundtest"
 
 scalaVersion := "2.11.6"
 
-libraryDependencies ++= (Seq("chisel", "hardfloat", "uncore", "junctions", "rocket").map {
+libraryDependencies ++= (Seq("chisel", "uncore", "junctions", "rocket").map {
   dep: String => sys.props.get(dep + "Version") map { "edu.berkeley.cs" %% dep % _ }}).flatten