Merge pull request #1026 from mehlis/ccnl-helper-thread

examples/ccn-lite-client/HOWTO

examples/ccn-lite-client/Makefile

examples/ccn-lite-client/main.c

examples/ccn-lite-relay/Makefile

examples/ccn-lite-relay/main.c

sys/net/ccn_lite/ccn-lite-relay.c

sys/net/ccn_lite/ccnl-core.h

sys/net/ccn_lite/ccnl-ext-appserver.c

sys/net/ccn_lite/ccnl-platform.c

sys/net/ccn_lite/ccnl-riot-compat.c

sys/net/ccn_lite/ccnl-riot-compat.h

sys/net/include/ccn_lite/ccnl-riot.h