enabling ch.hopping
HDLC XBee-compatible defines
<Auto Generated by Git>
mergint develop into master after rpl integration and scons msp430-gcc toolchain.
Merge branch 'master' of github.com:openwsn-berkeley/openwsn-fw
Merge branch 'develop'

Conflicts:
	firmware/openos/drivers/common/hdlcserial.c
	firmware/openos/drivers/common/openhdlc.h
cleaning after merge
unpacking struct that does not need to be pack
SAMR21 BSP Support Added
Build Failures are Fixed for SAMR21.
Merge pull request #98 from OpenMote/develop

FW-258. Fix.
aila -> mercator (WIP)
FW-271. aila -> mercator (WIP).
FW-271. aila -> mercator.
FW-271. aila -> mercator.
FW-271. 01bsp_mercator -> 03oos_mercator (WIP)
FW-271. 01bsp_mercator -> 03oos_mercator (WIP)
FW-271. 01bsp_mercator -> 03oos_mercator (WIP)
FW-271. 01bsp_mercator -> 03oos_mercator (WIP)
FW-271. renaming.
FW-271. WIP on mercator project.