Added feature endpoint.

Note that it requires features to be mapped to feature descriptions to return them, and currently no features are mapped so no features are returned.

Author: almacken

build.sbt

@@ -6,6 +6,9 @@ scalaVersion := "2.12.4"
 
 libraryDependencies += "org.parboiled" %% "parboiled" % "2.1.4"
 libraryDependencies += "com.typesafe.akka" %% "akka-http" % "10.0.11"
+libraryDependencies += "com.typesafe.akka" %% "akka-stream" % "2.5.12"
+libraryDependencies += "com.typesafe.akka" %% "akka-http-spray-json" % "10.1.1"
+libraryDependencies += "io.spray" %%  "spray-json" % "1.3.3"
 
 val elastic4sVersion = "6.2.8"
 libraryDependencies ++= Seq(

src/main/scala/de/upb/cs/swt/delphi/featuredefinitions/FeatureDescription.scala

@@ -0,0 +1,4 @@
+package de.upb.cs.swt.delphi.featuredefinitions
+
+//Describes all relevant fields for conducting searches on this class
+case class FeatureDescription(fType: String)