create two projects, one for non-framework dependant code (core) and …

…one for the existing scalatra bits

build.sbt

@@ -1,18 +1,31 @@
 name := "feature-switching"
 
-version := "0.12-SNAPSHOT"
+version := "0.13-SNAPSHOT"
 
 organization := "com.gu"
 
 scalaVersion := "2.10.0"
 
-libraryDependencies ++= Seq(
+lazy val commonDependencies = Seq(
   "javax.servlet" % "servlet-api" % "2.5" % "provided",
+  "org.slf4j" % "slf4j-api" % "1.6.1"
+)
+
+lazy val scalatraDependencies = Seq(
   "net.liftweb" %% "lift-json" % "2.5",
-  "org.slf4j" % "slf4j-api" % "1.6.1",
   "org.scalatra" %% "scalatra" % "2.0.5"
 )
 
+lazy val featureSwitchingCore = (project in file("core"))
+  .settings(libraryDependencies ++= commonDependencies)
+
+lazy val featureSwitchingScalatra = (project in file("scalatra"))
+  .settings(libraryDependencies ++= commonDependencies ++ scalatraDependencies)
+  .dependsOn(featureSwitchingCore)
+
+lazy val root = (project in file("."))
+  .dependsOn(featureSwitchingCore, featureSwitchingScalatra)
+
 publishTo <<= (version) { version: String =>
     val publishType = if (version.endsWith("SNAPSHOT")) "snapshots" else "releases"
     Some(