BibIndex: new `datasource` field and `786__w` tag

* Adds field `datasource`, associated with the new tag `786__w`

* Adds upgrade script

* Adds bibfield definition of `datasource` in `atlantis.cfg`

Signed-off-by: Federico Poli <federico.poli@cern.ch>
Merge pull request #36 from fpoli/prod-bibindex-datasource-field

BibIndex: new `datasource` field and `786__w` tag
Merge pull request #38 from WohthaN/bibauthorid-1.79-ops-hotfixes

Bibauthorid 1.79 ops hotfixes
BibRank: debug output for report numbers catchup
BibAuthorID: Graceful handling of an empty external publications list.

Signed-off-by: Artem Tsikiridis <artem.tsikiridis@cern.ch>
Merge pull request #39 from Osso/bibrank-debug-output

BibRank: debug output for report numbers catchup
Merge pull request #40 from atsikiridis/prod

BibAuthorID: Graceful handling of an empty external publications list.
installation: silence lisp compiler
Merge pull request #43 from Osso/silence-lisp-compiler

installation: silence lisp compiler
BibRank: disable losses checks
Merge pull request #44 from Osso/bibrank-disable-loss

BibRank: disable losses checks