Network clock using 7 segment. add SHT11

Dependencies:   SHTx SNTPClient WIZnetInterface mbed

Revision:
0:179f2315915f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Tue Apr 05 11:50:51 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/252557024ec3
\ No newline at end of file