The provisioner cookbook depends on apache (at least on suse)
Setup apache based proxy instead of using polipo
Use apache2 instead of nginx and polipo on all platforms

apache2 is available for all the supported distros and consolidating on a
single webserver seems like good idea from a maintenance perspective.
See also mailing list discussion at:
http://lists.us.dell.com/pipermail/crowbar/2013-March/002766.html
Don't use hardcoded path for the apache docroot

There is a variable already set in the recipe that points to the right path.
Set default ports for apache to listen on

This is to avoid it grabbing port 80 and 443 by default.
Fixed vhost configs for proxy and provisioner

- removed "Listen" and "NameVirtualHost" statements, they endup in ports.conf
  now
- Fixed CacheEnable option to actually cache http connection
Merge pull request #107 from rhafer/topic/apache_instead_of_polipo

https://github.com/crowbar/barclamp-provisioner/pull/107

Merged by devtool for VictorLowther