qmpfw: Quick Mesh Project legacy firmware generator (deprecated)

Change vm target from alix2 to generic. Closes #287.

Merge branch 'master' of qmp.cat:qmpfw

Conflicts:
targets.mk

Add x86 config (for PC)
Add target for alix
Add target for ar71xx imagebuilder

Remove ath5k dependency from ath-qmp-tiny-node to keep images small

Add specific targets for rs/rspro since they are using big-node

Add support for build an imagebuilder with all packages for at71xx

Add new profile for medium-node (small+tinyproxy+ath5k)
Remove ath5k from small-node profile
Create specific configs for tl-wdr4300/3600 since they use big-node profile

Adds a new way to generate/store the configuration files for each target:
There are profiles (such as ath-qmp-small-node) which are shared between all similar kind of devices (i.e ubiquiti devices)
And individual configurations (optional) which can be used to specify extra options for the device

Adds support for new special target "ar71xx" which compiles the firmware for all atheros AR7/9 devices.

Adds new target for t-mr3040 bmx6 testing