CMS: correct event display file names

* Adds explicit file names as they are not detected well from CMS DocDB
  download URLs.  (closes #108)

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
templates: fix for download URLs

* Fixes download URLs in templates.  (closes #110)

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
CMS: EOS URI for derived PAT tuple records

* Adds EOS URIs for CMS derived PAT tuple records.  (addresses #113)

* Indents whole XML file appropriately.

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
CMS: removal of `cms-tools-code-example.xml`

* Removes unnecessary `cms-tools-code-example.xml` example file.
  (references #120)

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
CMS: update of `cms-tools-vm-image.xml`

* Updates `cms-tools-vm-image.xml`.  (addresses #120) (PR #121)

Reviewed-by: Tibor Simko <tibor.simko@cern.ch>
UI: added img to "Get Started" page
UI: research link FIX

* (closes #119)
records: updated content after xml changes
UI: routing for "Getting Started page"
Add about pages for CMS