Build sources for jitpack.io

build.gradle

@@ -15,3 +15,11 @@ dependencies {
     targetCompatibility = 1.7
 }
 
+task sourcesJar(type: Jar, dependsOn: classes) {
+    classifier = 'sources'
+    from sourceSets.main.allSource
+}
+
+artifacts {
+    archives sourcesJar
+}