URL: "education" links on entry points FIX

* correct links for modified pages (closes #97)
UI: layout + links in educate/research page

* updated layout of  educate/research page
* corrected links for site navigation
footer: updated footer nav

* (addresses #75)
fixtures: added collection description
content: "Get Started" + "VMs" pages with text
UI: structure addded to "visualise" pages