Added WSGIPassAuthorization option to vhost.

Added The ProxyPreserveHost option to vhosts.

Updated readme with WSGIPassAuthorization information, updated spec and
rspec tests for WSGIPassAuthorization.

added documentation and test for ProxyPreserveHost option

Added WSGIPassAuthorization and ProxyPreserveHost options to vhost.
Fixing typo with braces in the rewrite section.
order proxy_set option so it doesn't change between runs
Merge branch 'master' of github.com:Conzar/puppetlabs-apache