Modifications required for successful build

- publish macros subproject using same scalaVersions as everything else
- fixed static method call on SearchPath interface
- remove unused imports

build.sbt

@@ -28,7 +28,6 @@ lazy val macros = (project in file("macros"))
   .disablePlugins(ScriptedPlugin)
   .settings(
     name := "sbt-jni-macros",
-    scalaVersion := scalaVersions.head,
     crossScalaVersions := scalaVersions,
     libraryDependencies += "org.scala-lang" % "scala-compiler" % scalaVersion.value % Provided,
     libraryDependencies += "org.scala-lang" % "scala-reflect" % scalaVersion.value,

plugin/src/main/java/ch/jodersky/sbt/jni/javah/ClassPath.java

@@ -14,13 +14,13 @@ public ClassPath(Path path) {
         this.path = path.toAbsolutePath();
 
         Path root = Utils.classPathRoot(path);
-        roots = root == null ? Collections.emptyList() : multiReleaseRoots(root);
+        roots = root == null ? Collections.emptyList() : SearchPath.multiReleaseRoots(root);
     }
 
     @Override
     public Path search(ClassName name) {
         Objects.requireNonNull(name);
-        return searchFromRoots(roots, name);
+        return SearchPath.searchFromRoots(roots, name);
     }
 
     @Override

plugin/src/main/scala/ch/jodersky/sbt/jni/plugins/JniJavah.scala

@@ -1,11 +1,10 @@
 package ch.jodersky.sbt.jni
 package plugins
 
-import java.nio.file.{Path, Paths}
+import java.nio.file.Paths
 
 import collection.JavaConverters._
 import util.BytecodeUtil
-import java.util
 
 import sbt._
 import sbt.Keys._