Enable ST-Link/V2 so we can speak to the board.

o Enable USB/EHCI with Device Filtering to enable ST-Link/V2
o Add and apply udev-Template to provide access to ST-Link/V2 without sudo(8)

The following OpenOCD 0.7.0 configuration was successfully tested:

source [find interface/stlink-v2.cfg]
source [find target/stm32f4x_stlink.cfg]
Steps in order to setup virtual machine.

o Add prerequisites (VirtualBox, Vbox Extension, Vagrant)
o Steps needed to start development
o Clarify the aim