BibFormat: Some format changes

* HEP brief/detail displays (ed.) for editors
* In reference tab when recordID is given in subfield $0,
  this reference links to HEP record
* In HEP detailed, if the 300_a subfield is empty,
  the "pages" suffix is not displayed anymore
BibFormat: Conferences, proceedings and contributions changes

* Conferences display CNUM, link to proceedings and link to
  the list of contributions
* Contributions have links to proceedings and conference
* Proceedings have links to contributions and conferences
* Small fix in bfe_INSPIRE_datepage (int was not casted)
BibFormat: Conferences and Institutions changes

* Displays the "children" institutions for every parent institution
* Displays data from multiple 411 and 111__e fields
BibFormat: Makes links in note field clickable

* Requires heat_links function from invenio urlutils.py
BibFormat: Removes the superfluous dot from the title

* Removes the superfluous dot from the title in
  HTML_brief and HTML_dateiled formats (fixes #1224)
BibFormat: Adds link to HepData tab

* Adds link in the HTML_Brief to the HepData tab
  in the HTML_Detailed view
BibFormat: Fixes minor bugs

* Fixes the link to the inspire record in references
  when there is a "0" subfield
* Fixes the spelling error in the proceedings link
* Adds more empty lines in the conferences form
BibFormat: Displays the date from the 260__c field
BibFormat: Resolves the DOI in the reference links
installation: removes usage of -u admin on install