During RIOT Summit 2018 the attending maintainers found that the
organization for the review process involving multiple maintainers is
lacking both in process description and existing mechanisms.

This changes the "Organisation of reviewing between maintainers"
section of the maintenance guidelines, to be in accordance with the
results of the discussions spawned from this fact.

If approved the following labels are added to GitHub:

- Reviewed: 1-fundamentals
- Reviewed: 2-code-design
- Reviewed: 3-testing
- Reviewed: 4-coding-conventions
- Reviewed: 5-documentation

Cleanup: drivers/makefile.dep

tests/netdev_test: remove non required feature periph_timer

Found out it is not actually linked.

Makefile.include: also detect features and blacklist on flash

Rename stm32mindev to blackpill

emb6: update link to documentation pdf

boards/cpu: cleanup duplicate includes

pkg.mk: do not use user identidy when applying patches

Update the link to the emb6 documentation pdf to its state at the time of PKG_VERSION, since the pdf has since been deleted from https://github.com/hso-esk/emb6/tree/develop/doc/.

Resolves https://github.com/RIOT-OS/RIOT/issues/8596.

edbg.inc.mk: handle IMAGE_OFFSET being defined with a space

Use fixed identity when applying patches, it fixes issues when they are
not set in the build computer or if HOME is not exported.

The commits are only used in the build system so adding the building user
information is useless.

boards/lobaro-lorabox: Add support for Lobaro LoraBox board

cpu: efm32: add support for no DC-DC converter

Handle that `IMAGE_OFFSET` can be set to something that contain spaces.

With 'IMAGE_OFFSET=$$((0x1000 + 0x1000))' we had in the command line when doing
'flash'

    --offset $((0x1000 --offset + --offset 0x1000))

With the change we correctly have

    --offset $((0x1000 + 0x1000))

xtimer_core: uncrustify

drivers/sx127x: Add initial support for multi interrupt pins

Now also print warnings if there are missing features or a blacklisted
board when doing 'make flash'

Before, only when doing 'make' or 'make all' the FEATURES_REQUIRED,
BOARD_BLACKLIST/WHITELIST and TOOLCHAINS were checked and a warning was printed.

However as 'flash' triggers 'all' it is a common case to do 'make flash'
directly instead of 'make all flash'. So better also print warnings in
this case.

drivers/sx127x: add option to use or not multi dio

tsrb: add drop function

Makefile.include: always include board Makefile.features

bench_timers: Fix mixup in trace output

sys/color/color.c: Fix a typo

nanocoap/example: fix resource order

net/gcoap: fix doc for order of server resources

examples/default: remove unnecessary dependency to sht11

This module is already included by the boards when saul_default is included. And the default application Makefile include saul_default

tests/bench_runtime_coreapis: remove unnecessary test target

pba-d-01-kw2x: remove duplicate MCPU