add LCD/ADC/KEY/LED device support using RTGUI to display the ADC and key status on the 128x64 LCD git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1317 bbd45198-f89e-11dd-88c7-29a3b14d5316
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1314 bbd45198-f89e-11dd-88c7-29a3b14d5316
running a LED thread git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1298 bbd45198-f89e-11dd-88c7-29a3b14d5316