demo code to use the SD card of Seeed Arch GPRS V2.0

Dependencies:   SDFileSystem USBDevice mbed

Revision:
0:0f3ea0944add
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDFileSystem.lib	Tue Apr 29 12:49:33 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/SDFileSystem/#7b35d1709458