Handle pickup location in storage retrieval request form the same as in hold form. Fixes translation of pickup location and "user-selected" default pickup location when there's only one choice.

- Resolves VUFIND-1179

- Updated GROUP BY clause to include both tags.id and tags.tag. Fixes bug that prevents tag autocomplete when using mySQL 5.7.5+

- View feedback instead of throwing
- Use of VuFind/Mailer
- Resolves VUFIND-1177

- In Dutch you can translate 'your' to 'je' or 'jouw'. The last one is more correct, so made the necessary changes.

- it is possible for there to be more than one request group for an item level hold.

- Added missing author_sort values to XSLT indexing.
- Added DC:contributor support to VuDL indexing.

- Windows script was broken due to vufind.bat references
- SOLR_HOME variable was used inconsistently with solr.sh; now both scripts point the variable to the same place
- Resolves VUFIND-1171

Thank you, Andre!

- Missing declaration and mocking non-existent method were causing Travis failures under PHP 7.

- "part" needs to be part of $bibliolevel and not vice versa

Conflicts:
	module/VuFind/sql/mysql.sql

# Conflicts:
#	build.xml
#	composer.json
#	config/vufind/config.ini
#	packages/DEBIAN/changelog
#	packages/DEBIAN/control