rust: Upgrade rust stable to 0.12
Merge pull request #4558 from tailhook/rust0.12

rust: Upgrade rust stable to 0.12
calibre: update from 2.5.0 to 2.6.0
nix-exec: Bump
python-scapy: new package

Powerful interactive network packet manipulation program.

http://www.secdev.org/projects/scapy/
Adding Pipelight via patch from Sven Keidel and some cleanup
Remove failing steps from pipelight build
docker: upgrade to 1.3.0
Merge pull request #4572 from tailhook/docker1.3

docker: upgrade to 1.3.0
ffmpeg: 1.2.8 -> 1.2.9
mtdev: 1.1.2 -> 1.1.5
libevdev: 1.2.1 -> 1.3
freerdpUnstable: 1.1 -> 1.2-beta1
libinput: Add derivation
weston: 1.5.0 -> 1.6.0
Remove all-packages.nix.orig

I'm pretty sure it was not the intention to add this file in
eee6f5a004b85779140a3d8684dcfe9bf5584566 ("Adding Pipelight via patch
from Sven Keidel and some cleanup").
libqb: 0.16.0 -> 0.17.1
radvd: 2.7 -> 2.8
nixUnstable: bump

Some memory and speed improvements
freerdpUnstable: fix license