templates: ATLAS Higgs challenge text update

* (PR #738)
ATLAS: Higgs Challenge 2014 record text updates

* (PR 737)
ATLAS: Higgs Challenge github repository update

* Updates location of the ATLAS Higgs Challenge 2014 github
  repository.  (addresses #660)

* Updates record metadata and installation instructions accordingly.

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
ATLAS: Higgs Challenge documentation full text

* Adds preliminary version of the ATLAS Higgs Challenge 2014
  documentation PDF file.  (addresses #660)

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
UI: updates for 'Glossary'

* removes ‘glossary’ box on Education section page
* adds link: ‘About’ > ‘ODP Glossary’
UI: updates wording in "Terms of use"

* (closes #715)
UI: "ODP Glossary"->"Glossary"