title: Value webSettings not found error in a Scalatra project
body: <p>I have a Scalatra project with the following <code>build.sbt</code></p>
  
  <pre><code>organization := "com.example"
  
  name := "scalatra-project"
  
  version := "0.1.0-SNAPSHOT"
  
  scalaVersion := "2.9.1"
  
  seq(webSettings :_*)
  
  libraryDependencies ++= Seq(
    "org.scalatra" %% "scalatra" % "2.0.1",
    "org.scalatra" %% "scalatra-scalate" % "2.0.1",
    "org.scalatra" %% "scalatra-specs" % "2.0.2",
    "org.scala-tools.testing" %% "specs" % "1.6.9",
    "org.eclipse.jetty" % "jetty-webapp" % "7.4.5.v20110725" % "container",
    "javax.servlet" % "servlet-api" % "2.5" % "provided",
    "net.liftweb" %% "lift-json" % "2.4-SNAPSHOT",
    "net.liftweb" %% "lift-mongodb" % "2.4-M5",
    "net.liftweb" %% "lift-mongodb-record" % "2.4-M5"
  )
  
  resolvers += "Sonatype OSS Snapshots" at "http://oss.sonatype.org/content/repositories/snapshots/"
  
  resolvers += "Scala Tools Snapshots" at "http://scala-tools.org/repo-snapshots/"
  
  resolvers += "Scala Tools Releases" at "http://scala-tools.org/repo-releases/"
  
  resolvers += "Maven Repo" at "http://repo1.maven.org/maven2"
  </code></pre>
  
  <p>When I run <code>sbt</code>, I get the following error:</p>
  
  <pre><code>error: not found: value webSettings seq(webSettings :_*)
  </code></pre>
  
  <p>How can I fix this problem?</p>