- ant task for javadoc added

- some javadoc changes
- package descriptions added

git-svn-id: https://svn.code.sf.net/p/libusbjava/code/trunk@160 94ad28fe-ef68-46b1-9651-e7ae4fcf1c4c

java/src/ch/ntb/usb/USB.java

@@ -31,8 +31,8 @@ public class USB {
 	private static LinkedList<Device> devices = new LinkedList<Device>();
 
 	/**
-	 * Create a new device an register it in a device queue or get an already
-	 * created device.<br>
+	 * Create a new device an register it in a device queue. If the device is
+	 * already registered, a reference to it will be returned.<br>
 	 * 
 	 * @param idVendor
 	 *            the vendor id of the USB device