service: "Terms of use" and "Privacy policy" added

* (closes #74)
UI: simplification of News page

* (closes #225)
Replace Lorem ipsum on Getting Started (Fixes #256)
Add intro to For Research (Closes #257)
Edit CMS news article (Closes #259)
CMS: records for "CMS External Resources"

* Initial release of records for "CMS External Resources"
  collection.  (PR #255)

* NOTE We may want to amend the data later in order to add screenshots.
UI: fixes in backward navigation

* backsard navigation now works in Educate, VM, Getting-started pages
(closes #243)