Add sources and javadoc

Author: Caitlin Bales (MSFT)

build.gradle

@@ -112,3 +112,12 @@ uploadArchives {
 
 }
 
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    classifier = 'javadoc'
+    from javadoc.destinationDir
+}
+
+artifacts {
+	archives sourceJar
+	archives javadocJar
+}