errorlib: context support in sentry

* Introduces support for HTTP, and user context in sentry, by
  exploiting information provided in req object when available.

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
BibEdit: user name in BibSched column

Signed-off-by: Javier Martin Montull <javier.martin.montull@cern.ch>
WebSearch: filtering of citation tab counts

* Does not filter anymore by collection:citeable in the counts displayed
  next to the tab title.
BibAuthorID: get_arxiv_url() fix

* Fixes generation of arXiv URL.

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Revert "BibRank: index all collections"

This reverts commit 89c931989670d622324c13c60d26cbf6f9209bf1.
Revert "BibRank: faster indexing"

This reverts commit e6f5e066a4e0a19f6cf8ef596618af68e8de9564.
BibRank: left over cites for deleted records

* Removes the recid from the information dictionary when computing
  citations so that references done via 999C50 are ignored for
  record not in the selected collections.
BibIndex: new country tokenizer, country index, country KB

* Amends SPIRES to Invenio converter to use index cc->country
* Disables SPIRES sintax conversion cc->postalcode
* Adds BibIndexCountryTokenizer
* Adds regression tests for country tokenization on country index
* Adds countrynames-to-country.kb
* Adds country index and country field (in tabfill and with an upgrade script)
* Adds command line utility 'kbload', useful to load a new kb from file
* Automatically loads 'countrycode-to-country.kb' when installing demo site
* Adds configuration variable CFG_WEBSEARCH_INSTITUTION_COLLECTIONS
* Adds tags 110__u, 371__d, 371__g, 371__x
* Assumes that the country of the institution records does not change.
  If it changes, a manual full reindexing is required.

Conflicts:
	modules/bibindex/lib/bibindex_engine.py
	modules/bibindex/lib/bibindex_regression_tests.py
	modules/miscutil/sql/tabcreate.sql
	modules/miscutil/sql/tabdrop.sql
	modules/miscutil/sql/tabfill.sql

Signed-off-by: Federico Poli <federico.poli@cern.ch>
BibSched: tracebacks with context