Added the possibility to define bootstrap modal settings for the lightbox with data attributes. (#835)

Fixed an issue where the login dialog breaks with ChoiceAuth if CSRF check fails for any reason (like session timeout).

- Try to avoid using it unless necessary.

- Includes more efficient, centralized health check for installer.

Encode the username, so spaces in the username don't throw an error.

- Used this to label the location_geo field utilized by geographic search.

Currently, sending record results by sms ("Text this" feature) is
always shown in the record page, even though it may not be applicable
to some installations.

Although still left enabled by default, with this patch, the admin
has the option to suppress the sms link in the record page, if needed.

The [Mail] section in main config file has been chosen to hold the new
parameter because sending sms messages uses the underline mailer
infrastructure.

- Was out of sync with actual configuration.

* Set pickupLocation=homebranch(es) when neither defaultPickupLocation nor pickupLocation[] is set in KohaILSDI.ini

- Use a timestamped init function name in Piwik tracking and load the tracking js only once. Fixes an error in lightbox and record tab tracking (Piwik logs to console: "A siteId must be given to add a new tracker").

- This allows a user to be authorized into EZproxy via VuFind login.