reading only one interrupt when it changes its value

Dependencies:   Hotboards_switches mbed

Revision:
0:e4efa77cbd55
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Hotboards_switches.lib	Wed Mar 02 20:34:27 2016 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/Hotboards/code/Hotboards_switches/#dfb1302f847d