Add support for highlighting authors (and other parts of an entry)
moved code for highlight of authors/editors to _get_value as suggested by bpiwowar
- added new highlight option to $option_names array as suggested by Jon Nicholson
fixed minor error in documentation
Added documentation for new highlight option
entry in contributor list of highlighting option
Merge remote-tracking branch 'upstream/master' into highlight-authors

Conflicts:
	documentation/index.html
	papercite.php
Merge pull request #85 from mhenze/highlight-authors

Highlighting of authors (and other parts of an entry)