Create bootstrap playbook

- Add provisioning steps to README.
- Add .gitignore and put hosts in it.
- Add bash completion uncomment.
- Create GentooPS1 lines.
- Set environment variables and put correct .bashrc.
- Customize vim.
- Fetch public key and place it to auth keys.
- Use variables from hosts file.
- rename vim/additional vim/vimrc.custom.
- Rename file aditional to vimrc.custom.
- Create bash.bashrc.d directory and move file to it.
- Group lines for completion.
- Set timezone "America/Sao_Paulo".

Fixes #1
Closes #28
Closes #29