gnrc_ipv6: fix asserts for NHC

cc2650stk: remove XTIMER_SHIFT_ON_COMPARE definition

Added nrf51 ac variant

boards/mulle: PTA17 analog input is on ADC1 module

boards/pba-d-01-kw2x/board.c: fix leds default state

doc: xtimer: be a bit more precise

gnrc_rpl: reduce scope of now

gnrc_ipv6: remove superfluous check for if_entry

make: remove obsolete check for jenkins

RIOT-2016.04 - Release Notes
============================
RIOT is a real-time multi-threading operating system that supports a range of
devices that are typically found in the Internet of Things: 8-bit
microcontrollers, 16-bit microcontrollers and light-weight 32-bit processors.

RIOT is based on the following design principles: energy-efficiency, real-time
capabilities, small memory footprint, modularity, and uniform API access,
independent of the underlying hardware (this API offers partial POSIX
compliance).

RIOT is developed by an international open source community which is
independent of specific vendors (e.g. similarly to the Linux community)
and is licensed with a non-viral copyleft license (LGPLv2.1), which allows
indirect business models around the free open-source software platform
provided by RIOT.

About this release:
===================
This release adds support for two additional network stacks: lwIP and emb6.
A bunch of additional protocols are now available, P2P-RPL in the GNRC
network stack, Ethernet-over-Serial (ethos). Murdock, the new, blazing fast
RIOT CI is now available to significantly speed up code merging procedures.

This release also adds support for a number of new boards and sensors and a new
tool for automated border router setup is now provided which greatly simplifies
that setup for newbies as well as for old-timers. Last but not least: this
release includes a number of bug fixes, mostly about stabilizing and enhancing
the networking capabilities of RIOT.

About 470 pull requests with about 1196 commits have been merged since the last
release and 127 additional issues have been solved. 55 people contributed code
in 124 days. 1521 files have been touched with ~91700 insertions and ~42200
deletions.

Notations used below:
=====================
+ means new feature/item
* means modified feature/item
- means removed feature/item

New features and changes
========================
General
----------
+ added Makefile support for creating a "binary distribution", making it easier to create closed source applications while still complying to LGPL

Testing

Signed-off-by: Johann F <j.fischer@phytec.de>

make: disable NHC

drivers/xbee: add optional AES encryption support

make: bail out if there are spaces in the path

If we use `rm -r(f)` then we should make sure that we don't delete
random directory trees because there was a whitespace in the path.

boards/mulle: mulle boards' serial port is derived from its serial nr

add encryption to drivers

fix new line at the end of file

add shell command for enable encryption and set encryption key on a given device

modify _net_if_set_encrypt_key to support any key length

modify _net_if_set_encrypt_key to support any key length of the key

modify blank line

fix ace before tab in indent

fix ace before tab indent

fix ace before tab indent an error

fix trailing white space

drivers/xbee: encryption support

add encryption to drivers

fix new line at the end of file

add shell command for enable encryption and set encryption key on a given device

modify _net_if_set_encrypt_key to support any key length

modify _net_if_set_encrypt_key to support any key length of the key

modify blank line

fix ace before tab in indent

fix ace before tab indent

fix ace before tab indent an error

fix trailing white space

modify drivers/xbee/xbee.c

fix white spaces on xbee.c

Update xbee encryption driver

white line at end xbee.h

fix error

fix sc_netif.c

fix rebase master interactive

drivers/xbee: encryption support

add encryption to drivers

fix new line at the end of file

add shell command for enable encryption and set encryption key on a given device

modify _net_if_set_encrypt_key to support any key length

modify _net_if_set_encrypt_key to support any key length of the key

modify blank line

fix ace before tab in indent

fix ace before tab indent

fix ace before tab indent an error

fix trailing white space

drivers/xbee: encryption support

add encryption to drivers

fix new line at the end of file

add shell command for enable encryption and set encryption key on a given device

modify _net_if_set_encrypt_key to support any key length

modify _net_if_set_encrypt_key to support any key length of the key

modify blank line

fix ace before tab in indent

fix ace before tab indent

fix ace before tab indent an error

fix trailing white space

modify drivers/xbee/xbee.c

fix white spaces on xbee.c

Update xbee encryption driver

white line at end xbee.h

fix error

fix rebase  conflict 4

fix same missing in patches changes

fix ascii to hex index parser

fix syntax rules

fix syntax issue 2

add _netopt_strmap NETOPT_ENCRYPTION e NETOPT_ENCRYPTION_KEY

fix trailng white spaces

at86rf2xx: fix option setting

gnrc_netdev: add deprecation note

core: allow DEBUG in mutex.c to run without DEVELHELP

tools: ethos: allow `start_network.sh` script to run from anywhere

cpu/cc2538/spi: Fix compiler warning of possible uninitialized variable

netdev ethernet: deal with too small packet buffer

gnrc_ndp: don't let addresses timeout

gnrc_ipv6: Revert #5179

cpu/samd21: fix ISR mapping for PB27

This is a temporary quick-fix for #5122 to not have GUAs removed on an
interface.
It solves the issue by both not letting the registration run out on the router
and by not letting the lifetime of an auto-configured address expire.

gnrc_sixlowpan_iphc: fix comparison signage