start alfred only if module is anabled

[rubo77]

Here there is a line that starts alrfed when fasd is coming up:

https://github.com/ffnord/ffnord-puppet-gateway/blob/master/templates/etc/fastd/fastd.conf.erb#L25

this has to be there only if alfred is installed

[rubo77]

should be solved with an if-block like

<% if @with_alfred > 0 %>
  ...
<% end %>