whitespace changes
changes to processing dio() message
join all RPL multicast group
dependancies for senddio
added/updated copyright messages
if dag not set, do not attempt to initialize it
reset dag to NULL
if prefix is not valid, then do not attempt to install it
fix call to ip(route2) to add a route
initailize iface properly in senddio
added travis-CI config
Merge remote-tracking branch 'origin/master'

Conflicts:
	include/oswlibs.h
	lib/libndmgmt/Makefile
	lib/libndmgmt/dag.cpp
	lib/libndmgmt/debug.cpp
	lib/libndmgmt/iface.cpp
	lib/libndmgmt/netlink.cpp
	lib/libndmgmt/node.cpp
	lib/libndmgmt/prefix.cpp
	programs/sunshine/Makefile
	programs/sunshine/main.cpp
	programs/sunshine/sendnd.cpp