reading a button state

Dependencies:   Hotboards_buttons mbed

Revision:
0:538950d8a034
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Mon Feb 29 20:59:52 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/252557024ec3
\ No newline at end of file