Attempt to allow Eclipse to import the Gradle project.

build.gradle

@@ -1,3 +1,12 @@
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.4'
+    }
+}
+
 plugins {
     id 'java'
 }