Tested build on a minimal Ubuntu 16.04 container image without wget.

Tested-by: Jannis Pinter <jannis@pinterjann.is>

The GLUON_ATH10K_MESH must be set to 11s or ibss; when it is not set,
ath10k device images won't be built at all. This also allows us to remove
the BROKEN flag for ath10k devices, as the GLUON_ATH10K_MESH variable is
sufficient to avoid ath10k devices if desired.

Fixes #864

The MR1750 and OM5P-AC devices are based on ath9k SoCs and an external
ath10k chip. All devices which are using ath10k should be marked as broken
due to deficits in their IBSS support.

Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>

Fixes #842

[Matthias Schiffer: changed the text a bit]

+ added profile for these devices
+ added entry in the docs for these devices plus the missing alfa tube

Generate flashable images for the Archer C7 v2 with current stock firmware
again.

To set the region code, the GLUON_REGION variable must be set to "us" or
"eu" in site.mk or as a make argument.

Fixes #860

Allows weird release numbers, models and site names, and prepares support
for pretty hostnames.

and add documentation

Use the common term; the "Expert Mode" never was a distinct mode of
operation anyways.

Fixes #823

The new MR1750v2 device support is only available in LEDE master. The
relevant patches have to backported to add support for them in Gluon

Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>