Skip a2enmod and a2ensite tasks if not required

Tell the user to use Vagrant 1.3.x

Set two variable files from site.yml

Apache vhost misconfiguration

Tarsnap warns about leading /

That way it's more convenient to uncomment an entire paragraph.

Refs #39

That way the default values will not be applied by mistake. The user
needs to uncomment the lines from `vars/users.yml` and set them.

Also renamed openvpn variables.

Refs #39

Refs #39

That way we can override all the config from a central location. The
`user.yml` file overrides `defaults.yml`. `user.yml` was added to
`.gitignore` in order to allow a user to change it without having to
worry about merges. It's easy to do a diff to see what changed between
the defaults and your own settings.

Needs documentation, this is just a proposal.

Refs #39

Fix trailing whitespace

Also replace the global variable with a local one

(such as root's cron errors)

Feature/roundcube

TLS fixes & detailed install instructions

Fix CAcert usage in postfix and dovecot

Fix Postfix TLS configuration

Fix Postfix configuration file to link to correct SSL certificate locations

Misc Cleanup

Automate encfs setup and name mount point more appropriately

Adding bits for configuring mail aliases.

SSH security improvements

Apache SSL improvements

Postfix TLS fixes