Takes advantage of a new config in the latest version of flot. Also, color contrast adjustment.

- Rewrote Javascript to make better use of server-side logic
- Eliminated many server-side special cases specific to lightbox handling
- Adjusted test suite to accommodate improvements

- Provides a more granular mechanism than the availability boolean for conveying status information for the summary view.
- Currently supported by DAIA and Demo drivers.

- Resolves VUFIND-1148.

https://github.com/vufind-org/vufind/commit/c48fa3f14217e038c92fc77bf896a7fea8d237d4#diff-edf8476533b4bc681f3ab3f807da461d did change the css-cursor-behaviour

- Minor adjustment to bootstrap.less to account for changes to modal background opacity.

- 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