Disable the IPv4 travis job
Merge pull request #343 from g-oikonomou/travis-disable-ipv4

Disable the IPv4 travis job
Removed unnecessary code from resolver.
Merge pull request #345 from oliverschmidt/master

Removed unnecessary code from resolver.
Initialize tcpip process before resolver process.

Since introduction of mDNS (https://github.com/contiki-os/contiki/commit/f145c17039b778cde1d53b6828757cd91dc8480a)
the resolver process initialization depends on the tcpip process
already being initialized (because of the call to udp_new()).
Merge pull request #346 from oliverschmidt/master

Initialize tcpip process before resolver process.
Removed unnecessary code from resolver.
Merge pull request #351 from oliverschmidt/master

Removed unnecessary code from resolver.
Allow text screen memory to be aligned to 0x2000.
Merge pull request #356 from oliverschmidt/master

Allow text screen memory to be aligned to 0x2000.
Check for DAO fwd loop early, before processing DAO options
Define a new ICMPv6 message type for Trickle Multicast

Pending IANA allocation, we currently use private experimentation
New uip_is_addr macros for multicast addresses
Multicast common header files
Multicast routing table manipulation

We store multicast routes in a separate table since we don't need
as much information as we need for normal routes
We now know how to select our source address for outgoing routable multicast datagrams
RPL Multicast group management with MOP 3
Implementation of the SMRF multicast engine
Implementation of the Trickle multicast engine
Include multicast engines in the build