Remove naming restriction on bedrock path

details in #96
Merge pull request #97 from fullyint/bedrock-path

Remove naming restriction on bedrock path
Added better ssh defaults, added fail2ban, ferm for added security.
Merge pull request #58 from FightTheCurrent/feature/security

Feature/security
Bump Ansible requirement to 1.6

debconf module is used in ferm role which does not exist until 1.6