added libxbee library

thirdParty/libxbee/sample/multi.c

thirdParty/libxbee/sample/scan.c

thirdParty/libxbee/sample/scan_adv.c

thirdParty/libxbee/sample/simple.c

thirdParty/libxbee/sample/talk_to_me.c

thirdParty/libxbee/sample/vb6/README.txt

thirdParty/libxbee/sample/vb6/demo/Form1.frm

thirdParty/libxbee/sample/vb6/demo/demo.bas

thirdParty/libxbee/sample/vb6/demo/demo.vbp

thirdParty/libxbee/sample/vb6/libxbee.bas

thirdParty/libxbee/sample/vb6/talk_to_me/Form1.frm

thirdParty/libxbee/sample/vb6/talk_to_me/talk_to_me.bas

thirdParty/libxbee/sample/vb6/talk_to_me/talk_to_me.vbp

thirdParty/libxbee/sample/xbee2_rx.c

thirdParty/libxbee/sample/xbee2_tx.c

thirdParty/libxbee/win32.README.txt

thirdParty/libxbee/xbee.h

thirdParty/libxbee/xsys/README

thirdParty/libxbee/xsys/linux.c

thirdParty/libxbee/xsys/linux.h