Make phing php-cs-fixer tasks output verbose information. Make the dr…

Make phing php-cs-fixer tasks output verbose information. Make the dry-run task show diffs about required changes.

Added sudo: false to use Travis' container-based infrastructure.

The code already contained everything to enable less parser caching but the function Regen() was called instead of Get() for no apparent reason. Regen() is basically a wrapper around Get() that disables caching, see https://github.com/oyejorge/less.php/blob/master/lib/Less/Cache.php .

- This should not be limited to a single parameter.

Fixes form submission on error

Minor translation issues in core

* someones eagle eye recognised these two minor errors in core translation files

bibtex-export

* removes field 'crossref' from bibtex-export
* crossref is used for links to records (host items) within the same bibtex file, not to link to the record itself. See https://en.wikipedia.org/wiki/BibTeX#Cross-referencing for examples
* if used, the field causes trouble with literature management software who interpret it as link to host item

fixed typo in resolverLinks templates

- Some CSS adjustments to jquerymobile to match.

* refactored signature of OpenUrl->isActive()
* updated tests to new signatures in OpenUrl view helper
* updated templates to new signatures in OpenUrl view helper
* corrected 'records' location to 'record' for consistency with config.ini.

- Moved more logic into OpenUrl view helper.
- Added configuration to control display of OpenURLs without code changes.
- Renamed OpenURL record driver methods for improved consistency.
- Added tests.