Add libusb to list of dependencies for building.

README

@@ -45,7 +45,9 @@ Dependencies:
 	AMD ADL SDK		http://developer.amd.com/sdks/ADLSDK
 	(This sdk is mandatory for ATI GPU monitoring & clocking)
 	libudev headers
-	(This is only required for FPGA auto-detection)
+	(This is only required for FPGA auto-detection and is linux only)
+	libusb headers
+	(This is only required for ZTEX support)
 
 CGMiner specific configuration options:
 	--enable-cpumining      Build with cpu mining support(default disabled)
@@ -103,18 +105,7 @@ Basic WIN32 build instructions (LIKELY OUTDATED INFO. requires mingw32):
 	make
 	./mknsis.sh
 	
-Native WIN32 build instructions (outdated, see windows-build.txt)
+Native WIN32 build instructions: see windows-build.txt
-	Install the Microsoft platform SDK
-	Install AMD APP sdk, (if you want GPU mining)
-	Install AMD ADL sdk, (if you want GPU monitoring)
-	(Do NOT install the ati amd sdk if you are on nvidia)
-	Install mingw32
-	Install libcurl, copy libcurl.m4 into /mingw/share/aclocal
-	Install pkg-config, copy pkg.m4 into /mingw/share/aclocal
-	Run:
-	autoreconf -fvi
-	CFLAGS="-O2 -msse2" ./configure
-	make
 
 ---
 

windows-build.txt

@@ -222,3 +222,8 @@ For you. Make sure you never remove the ADL_SDK folder from your home folder.
 #       Native WIN32 setup and build instructions (on mingw32/Windows) complete      #
 #                                                                                    #
 ######################################################################################
+
+Addendum:
+Ztex support requires libusb support. The most comprehensive support is
+currently available from the libusbx project here:
+http://libusbx.org/