Use memcpy, memcmp functions for the rime compare and copy functions as they
are already used all over contiki.
Code style fixes
Make DS6 route notifications optional.
Merge pull request #217 from lebrush/rime-memory

Use memcpy, memcmp functions for the rime cmp and cpy
Merge pull request #221 from lebrush/uip-ds6-notifications

Make DS6 route notifications optional
Added the DE-CUSUM demo code with Matlab version
Merge remote-tracking branch 'upstream/master'