Merge pull request #3 from dberzano/master

Some more polishing
support for auto_login
Merge pull request #4 from dberzano/master

Robust perm fix for authorized_keys of sshcertauth
Merge branch 'master' of github.com:cernvm/amiconfig
support x509 cert file
read ec2 user data locally
Merge branch 'master' of github.com:cernvm/amiconfig
read ec2 user data locally
Merge branch 'master' of github.com:cernvm/amiconfig
syntax fix
Merge branch 'master' of github.com:cernvm/amiconfig
start puppet service during contextualization
Improved way of retrieving extra user-data