Added gradle build

step-4/build.gradle

@@ -0,0 +1,80 @@
+buildscript {
+  repositories {
+    maven {
+      url "https://plugins.gradle.org/m2/"
+    }
+  }
+  dependencies {
+    classpath "gradle.plugin.io.vertx:vertx-gradle-plugin:0.0.8"
+  }
+}
+
+
+apply plugin: 'java'
+
+group = 'io.vertx'
+version = '1.3.0-SNAPSHOT'
+
+description = """"""
+
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
+
+tasks.withType(JavaCompile) {
+  options.encoding = 'UTF-8'
+}
+
+
+
+repositories {
+  jcenter()
+}
+
+ext {
+  vertVersion = '3.5.1'
+}
+
+dependencies {
+  compile "io.vertx:vertx-core:$vertVersion"
+  compile "io.vertx:vertx-jdbc-client:$vertVersion"
+  compile "io.vertx:vertx-service-proxy:$vertVersion"
+  compile "io.vertx:vertx-codegen:$vertVersion"
+  compile "io.vertx:vertx-web:$vertVersion"
+  compile "io.vertx:vertx-web-client:$vertVersion"
+  compile "io.vertx:vertx-web-templ-freemarker:$vertVersion"
+  compile "com.github.rjeschke:txtmark:0.13"
+  compile "ch.qos.logback:logback-classic:1.2.3"
+  compile "org.hsqldb:hsqldb:2.3.4"
+  testCompile 'junit:junit:4.12'
+  testCompile "io.vertx:vertx-unit:$vertVersion"
+}
+
+
+sourceSets {
+  generated {
+    java.srcDir "${projectDir}/src/generated/java"
+  }
+}
+
+task generateProxies(type: JavaCompile) {
+  group = "build"
+  description = "Generate Vert.x service proxies"
+
+  source = sourceSets.main.java
+  classpath = configurations.compile
+  options.compilerArgs = [
+    "-proc:only",
+    "-processor", "io.vertx.codegen.CodeGenProcessor",
+    "-Acodegen.output=${projectDir}/src/main"
+  ]
+  destinationDir = file("${projectDir}/src/generated/java")
+}
+
+compileJava {
+  dependsOn generateProxies
+  source += sourceSets.generated.java
+}
+
+clean {
+  delete += sourceSets.generated.java.srcDirs
+}