Build project using Gradle

.gitignore

@@ -1,2 +1,6 @@
 out
-workspace.xml
+workspace.xml
+
+.gradle
+build
+local.properties

README.md

@@ -4,8 +4,16 @@ Kotlin Koans
 Kotlin Koans are a series of exercises to get you familiar with the Kotlin Syntax. 
 Each exercise is created as a failing unit test and your job is to make it pass. 
 
-Open up the project in IntelliJ IDEA or your favorite editor. 
-Run 'All tests' and fix them.
+#### How to build and run tests
+
+Working with the project using Intellij IDEA or Android Studio:
+1. Import the project as Gradle project.
+2. To build the project and run tests you can use 'All tests' run configuration or 'test' task on Gradle panel. 
+
+You can also build the project and run all tests in terminal:
+```
+./gradlew test
+```
 
 #### How to work with Koans using this project
 

build.gradle

@@ -0,0 +1,28 @@
+buildscript {
+    ext.kotlin_version = '1.0.4'
+
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+apply plugin: 'kotlin'
+
+sourceSets {
+    main.java.srcDirs += 'src'
+    test.java.srcDirs += 'test'
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    compile 'com.google.guava:guava:16.0'
+    testCompile 'junit:junit:4.12'
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Wed Oct 05 16:13:31 MSK 2016
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.0-bin.zip