- Resolves VUFIND-1109.

- See https://github.com/googlei18n/libphonenumber for details

- Resolves VUFIND-217 by adding delete capabilities
- Changes the way tags are counted -- now counted per-user, rather than per-copy, for more accurate ranking
- Includes some stylistic improvements to the LESS code

- Made jsonToHTML protected, as it does not need to be public
- Separated formatting of HTML and JSTree JSON so that neither depends on the other

Finnish and Swedish language tweaks in line with commit 8b22d3fa...

Conflicts:
	themes/bootstrap3/templates/search/results.phtml

- Restored missing "purge" button
- Made icons more consistent

Favorites Terminology Update

item_id in getHolding response must be the ID of the item, not of the bibliographic record

item_id
(see https://vufind.org/wiki/vufind2:building_an_ils_driver#getholding -> item_id)

from VuFind documentation: "item_id - the item (as opposed to bibliographic)
identifier (optional)"

-> when parsing JSON take $item["id"] as item_id

- currently only works for Solr; Summon implementation probably possible with some variation.