Merge pull request koush#259 from Yurii-Laguta/patch-1

Update README.md with gradle dependency

Author: koush

README.md

@@ -28,6 +28,13 @@ Download [the latest JAR](http://repository.sonatype.org/service/local/artifact/
 </dependency>
 ```
 
+Gradle: 
+```groovy
+dependencies {
+    compile 'com.koushikdutta.androidasync:AndroidAsync:1.0.0'
+}
+```
+
 ### Download a url to a String
 
 ```java