removed needless files in firmware and ide
removed error LED, dont use error LED
example is fiexed
modified error exception handling
modified comment and util.c
2013-04-25 commits

1. move zigbee codes to libraries folder and remove it from core library
2. fix not building in linux
3. modified mac os x build
purged some files(arduino compatible methods)

purged some files(arduino compatible methods) in core library
commit makefile  that omitted in previous commit

commit makefile that omitted previous commit
some exmaples was modified

some exmaples was modified
modifid comm fail in RX operation DXL
Added ultrasonic library made by prof. Mason
missing dxl_devices.h problem was fixed
Add DXL PRO and OLLO port libraries
Commit supporting CM-904
fix cm-904 pin numbering
fixed some problem in RC100 library

Thanks to hhgyu
restore some codes relating button for CM-904
2013-06-14
add TX/RX gpio init codes in rc100_core.c
fix some exceptions in editor.java