Add mesh_ready() to mesh
mesh_ready checkes whether a packet is queued. This allows to avoid
packet loss at application level.
core/net/resolv: Fix for SDCC.
core/net/resolv: Fix for resolving CNAME records.
core/net/resolv: Misc. updates and cleanups.
Merge pull request #168 from darconeous/pull-requests/core-net-resolv-misc

Miscellaneous small DNS resolver updates and fixes
Restored build in cmd.exe environmet by re-applying change https://github.com/contiki-os/contiki/commit/f3cf57e41b277beebd353a4d76aba2359868b361 which was reverted recently.
Merge pull request #169 from oliverschmidt/master

Restored build in cmd.exe environment.
Fix a syntax error in /cpu/cc253x/dev/uart0.c
[ci] Travis needs 32-bit compatibility libraries
Merge pull request #171 from errordeveloper/fix_cs_toolchain_install_script_on_travis

[ci] Travis needs 32-bit compatibility libraries
Merge pull request #170 from RongHQ/master

Fix a syntax error in cpu/cc253x/dev/uart0.c
Split the collect test into collect and collect-lossy to make each individual
travis build complete faster.

Also changed the armgcc download link to a github location.
Updated paths to relative paths to make it easier to move tests to new directories
Separated the uIP makefile from the top-level Makefile.include into a separate core/net/Makefile.uip makefile
Added #if UIP_CONF_IPV6 around the IPv6 code in the uIP source tree to allow the C files to be compiled even if IPv6 is not configured.
Let the framer functions use ints instead of uint8_t to make them more generic
A number of updates to nullrdc

* add a few rimestats to keep track of sent and received acks
* made a number of configuration options possible to override (ack timing)
* added the logic for sending 802.15.4 link layer ack packets, despite not being able to guarentee the 802.15.4 MAC timing
* increased the number of sequence numbers to keep track of for duplicate filtering
Send announcements only if the node is configured to be a router
New mechanism for computing the 6lowpan header length dynamically, depending on how large header the framer creates. Also check the incoming packet for buffer overflow.
Rimestats bugfix: only compile the rimestats printout if rimestats are enabled