CMS: extended record examples

* Enriches record examples for CMS primary dataset, CMS derived dataset,
  CMS tools code.  (addresses #34)
collection_list: show depending on edu/research
records: record template by collection

* displaying a record template depending on it's collection
homepage: cms/alice btns + "about" + responsive

* CMS/ALICE buttons added for experiment separation (closes #73)
* homepage mobile responsive (closes #76)
* “ABOUT” link on header
* change to a more greyish colour on bg-icons (see #73)
UI: changes due to collections renaming
homepage: updated for responsiveness

* minor fixes to homepage responsiveness (see #76)
UI: text change in 404

* text change from "Oups" -> "Oops" (closes #85)
UI: css error FIXES
tests: demo site population

* Amends test suite demo data examples: removes `001` MARC tag, sets FFT
  local path to suite VM vagrant box.  This makes demo site population
  to work.

* Adds example how to call `invenio2-kickstart` accordingly.

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
UI: added dropdown menus
records: changed text in dedicated box
UI: educate/research collection list update

* updated collection list record boxes (addresses #55)
* introduced “collection areas” col_items / tools
UI: links and routes added to homepage

* prepares the “about” links and pages for content to be added (closes
#65)
* prepares pages for all links in “entry points” (addresses #66)
UI: FIX for tab functionality in collection_list

* FIX for default activated tab on pageload
URL:  `/educate/` -> `/education/`

* name change for the “education” routing (closes #97)
CMS: richer metadata in primary dataset records

* Enriches metadata of CMS Primary Dataset records.
  (addresses #34) (PR #91)

Reviewed-by: Tibor Simko <tibor.simko@cern.ch>
README: new `force-recids` option for demo site

* Adds `-e force-recids` option to populate demo site with wanted record
  IDs.  (references #34) (references PR #91)

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>