Update README.md

Author: Cristian

README.md

@@ -1,9 +1,15 @@
-java-cloudfiles
+Java CloudFiles
 ===============
 
 This library is a branch of [Rackspace Java CloudFiles project](https://github.com/rackerlabs/java-cloudfiles]). It is used in the desktop client to communicate with Swift.
 
-In order to build:
+## Requirements
 
-1)  Download the repository (which if you're doing this, you already have)
-2)  type "ant compile" (or "ant package" if you'd like the full package)
+- Java 1.7
+- Maven
+
+## Build and execution
+
+To create a jar:
+
+    $ mvn assembly:assembly