Towards building jlibusb with gradle

* rename package ch.ntb.inf.libusbJava to ch.ntb.usb/Device.java
* separate main, app, test and demo source files
* reorganise static library files
* add prebuilt libraries for testing purposes
* move auxiliary files to appropriate directories
* remove obsolete files

src/main/java/ch/ntb/usb/Utils.java

@@ -0,0 +1,60 @@
+/* 
+ * Java libusb wrapper
+ * Copyright (c) 2005-2006 Andreas Schl<68>pfer <spandi at users.sourceforge.net>
+ *
+ * http://libusbjava.sourceforge.net
+ * This library is covered by the LGPL, read LGPL.txt for details.
+ */
+package ch.ntb.usb;
+
+import java.io.PrintStream;
+
+public class Utils {
+
+	public static void logBus(Usb_Bus bus) {
+		logBus(bus, System.out);
+	}
+
+	public static void logBus(Usb_Bus bus, PrintStream out) {
+		Usb_Bus usb_Bus = bus;
+		while (usb_Bus != null) {
+			out.println(usb_Bus.toString());
+			Usb_Device dev = usb_Bus.getDevices();
+			while (dev != null) {
+				out.println("\t" + dev.toString());
+				// Usb_Device_Descriptor
+				Usb_Device_Descriptor defDesc = dev.getDescriptor();
+				out.println("\t\t" + defDesc.toString());
+				// Usb_Config_Descriptor
+				Usb_Config_Descriptor[] confDesc = dev.getConfig();
+				for (int i = 0; i < confDesc.length; i++) {
+					out.println("\t\t" + confDesc[i].toString());
+					Usb_Interface[] int_ = confDesc[i].getInterface();
+					if (int_ != null) {
+						for (int j = 0; j < int_.length; j++) {
+							out.println("\t\t\t" + int_[j].toString());
+							Usb_Interface_Descriptor[] intDesc = int_[j]
+									.getAltsetting();
+							if (intDesc != null) {
+								for (int k = 0; k < intDesc.length; k++) {
+									out.println("\t\t\t\t"
+											+ intDesc[k].toString());
+									Usb_Endpoint_Descriptor[] epDesc = intDesc[k]
+											.getEndpoint();
+									if (epDesc != null) {
+										for (int e = 0; e < epDesc.length; e++) {
+											out.println("\t\t\t\t\t"
+													+ epDesc[e].toString());
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+				dev = dev.getNext();
+			}
+			usb_Bus = usb_Bus.getNext();
+		}
+	}
+}