RIOT-OS/RIOT — pull request #1015 by OlegHahm (2014-04-16 10:32:39+00:00)
Title: Some doxygen fixes

I wasn't able to convince doxygen to include all definitions from all the `sys/net/include/sixlowpan/` headers directly into the `net_sixlowpan` group (apparently because they are in a subfolder of the file where `defgroup` is set(?)), so I added some subgroups.