Shorten long author and affiliation lists. Refs #365.

In catalog#index: Display list of at most 3 authors suffixed by "et al.".

In catalog#show: Display expandable lists of af most 3 authors and affiliations.
Author list suffixed by "et al.". Non-JS browsers fall back to displaying the
full lists.
Cleanup inconsistencies and whitespace in javascript files
Fix stubbed cas authentication

Stubbed authentication now also uses the provider name :dtu_cas
Update rack gem to 1.4.5 due to vulnerabilities

See http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0263 and
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0262
  Update json gem to 1.7.7 due to vulnerabilities

  See https://groups.google.com/forum/?fromgroups=#!topic/rubyonrails-security/4_YvCpLzL58
Update rails gem to 3.2.12 due to vulnerabilities

See http://weblog.rubyonrails.org/2013/2/11/SEC-ANN-Rails-3-2-12-3-1-11-and-2-3-17-have-been-released/