* corrected serial initialization (as mentioned by tglaria) in
      * cpu/jennic/init.c
      * platform/jndevkit/contiki-main.c
fix leds-arch.c
thanks tlgaria
Merge branch 'master' of github.com:pscholl/contiki-jn51xx
add hopfgarten timesync patches

enable with JENNIC_CONF_TIMESYNC 1
Merge branch 'master' of github.com:pscholl/contiki-jn51xx
Merge branch 'master' into jenv-experimental