Se utilizo un encoder para un PID

Dependencies:   QEI TextLCD mbed

Revision:
0:9925883eec45
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/QEI.lib	Fri Nov 29 16:14:49 2013 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/aberk/code/QEI/#5c2ad81551aa