Don't include the NameVirtualHost directives in apache >= 2.4, and add tests for this that will at least work with Ubuntu 13.10 and Ubuntu 14.04.

Tests will still work anywhere with apache < 2.4, but haven't been updated to support RHEL7 yet.
Merge pull request #708 from mhaskel/NameVirtualHost-deprecation

Don't include the NameVirtualHost directives in apache >= 2.4, and add t...