[RHEL/6] Include SSG logo into generated HTML guide if underlying oscap
         version on the system supports <svg> element to be present within
         <front-matter> element of the <xccdf:benchmark>
[RHEL/7, Fedora] Include SSG logo into generated HTML guide if underlying system oscap version supports it
Merge pull request #17 from iankko/master

Include SSG logo into RHEL-6, RHEL-7 & Fedora