Vagrant configuration preparation

Folder for Vagrant configuration created and small readme file added
Simple Vagrantfile added
.gitignore file for vagrant internal folder

The .vagrant folder contains local settings. All settings can change on
every vargant up command, so it is not good idea to keep .vargant
folder under git management.
Configuration of vagrant shared folder changed

Vagrant file is not in project (git project) root directory. That means
the ansible playbooks are not shared with virtual machines (on default
only vagrant parent is shared).

Changed configuration specify that whole git project will be shared
with virtual machines