Revert "bluemote: eth0 -> enp0s3"

This reverts commit 3b060530ca53b798075c075587ee18397f920aea.
bluemote: switch to non-predictable interface names

- we only have 1 NIC
- running inside a kvm gives us eth0 no matter what
bluebook: try kernel 3.15-rc5
let's try the coq proof assistent
new release structure?
changed secret handling to use systemd-ask-password
and systemd-tty-ask-password
provide vms for all machines
remove some old openvpn cruft
bluebook/powersaving: needs 2nd harddisk to set its properties
bluebook: redshift is already enabled by default upstream
bluebook: auto mount sdb
/home/mathijs/dev: add typescript
bluebook: limit forwarding to tap1
bluebook: create tap2 interface for vms without internet access
shared-config: made it easier to override parts of the config
bluemote/network: move gateway configuration to shared config too
bluebook/network: create taps and bridges for interconnected vm setup
bluebook: don't delay our bridges too long before forwarding
bluebook/network/bridging: make a little less fragile for use in vms
provide a virtual playground for testing new setups

This allows all machines to participate on a completely isolated
subnet. With a (future) smart dns/route/dhcp stub, we can actually
turn this into full internet emulation, allowing us to use more
vanilla virtualized setups (no overriding ip address and stuff)