Windows support contribution:

- Move CMake modules from cmake_modules/ to cmake/modules/
 - CMake now use cmake/config_windows.h.cmake to create config.h on Windows platform
 - contrib/windows.h header is automagically included by config.h
 - Put missing NFC_EXPORT macro on front of emulation API
 - nfc-mfclassic and nfc-mfcultralight examples are now compiled under Windows
Many thanks to Glenn Ergeerts which provide the initial patch.

cmake/modules/Makefile.am

@@ -0,0 +1,6 @@
+EXTRA_DIST = \
+	COPYING-CMAKE-SCRIPTS \
+	FindLIBUSB.cmake \
+	FindPCSC.cmake \
+	UseDoxygen.cmake \
+	LibnfcDrivers.cmake