Allow Apache service not to be managed by Puppet

Currently Apache can either configured to be 'running' or 'stopped'. In our cluster setup Apache is managed by Pacemaker, so Puppet should not interfere. Setting ensure to 'UNSET' will now set ensure to undef for the Apache service.
The apache class now accepts true, false, 'running' or 'stopped' for the parameter service_ensure. Any other value wil result in the parameter 'ensure' for the Apache service being set to undef.
Whoops
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
Merge pull request #694 from Conzar/master

Added WSGIPassAuthorization option to vhost.
Merge pull request #690 from arnoudj/master

Allow Apache service not to be managed by Puppet
(MODULES-910) Convert @apache_version to a string

Three part version numbers cannot be floats and must
be represented as strings. This commit changes all instances
of $apache_version and any comparsions to use strings and the
versioncmp function.

This also fixes comparsion of Float and String errors with future
parser enabled.
Merge pull request #731 from blkperl/convert_versions_to_string

(MODULES-910) Convert @apache_version to a string
Add fcgid options

This adds fcgid.conf to configure the fcgid module. It also adds the
FcgidWrapper option to vhost's directories.

The vhost option lacks any validation and allows users to shoot
themselves in the foot, but without iteration from the puppet future
parser I don't see a way to add the validation. Iteration would also
allow auto including apache::mod::fcgid.
MODULES-956 Added loadfile_name parameter to apache::mod.

This will allow for more control over the module load order, since
they appear to be loaded alphabetically.
Update README.md

Add http:// protocol to URLs referring to Apache web site so that markdown processor doesn't think that they are relative URLs.
Add ability for handling more than one 'Allow from'-directive in _directories.erb
Change inclusion of apache::mod::rewrite in vhost.pp
Update _proxy.erb

doing some formatting. removing unnecessary line breaks.
Merge pull request #737 from mhaskel/rename_mod_load

MODULES-956 Added loadfile_name parameter to apache::mod.
Renamed file resource to use loadfile_name if provided.
Merge pull request #746 from mhaskel/rename_mod_load

Renamed file resource to use loadfile_name if provided.