Changes:
- Add `docroot_owner` and `docroot_group` parameters apache::vhost
- Deprecate apache::{dev,php,proxy,python,ssl} in favor of their
  apache::mod::* equivalents and update docs
- Update rakefile/spec for puppetlabs_spec_helper gem

Bugfixes:
- Add dependency for mod.d directory after package
- Fix apache::vhost::proxy and apache::vhost::redirect to create *.conf
  files