hyhull-114 - Upgrade Hydra libraries to latest Hydra gem version.  This includes:-
 - hydra 6.1.0 gem (inc. hydra-head 6.4.0, active-fedora 6.7.0, jettywrapper 1.5.0 etc..)
 - Rails 3.2.15+
 - Added jquery-ui-rails gem for continued jquery-ui support in Assets

Also upgraded:-

  - Devise
  - Devise cas authenticable

Made minor changes to DisplaySet and StructuralSet validation to fix false negatives (causing test failures)
hydra-114 Hydra gem upgrade.  This commit includes changes to remove Deprecation warnings from hyhull. Deprecation warnings removed include:-
 - delegate_to changed to has_attributes
 - Removed usage of Nokogiri Datastream in specs
 - Supplied cast: false to use of ActiveFedora::Base.find where appropiate
hyhull-114 - Upgrade hyhull to latest hydra gem.  Removed an ActiveFedora::Associations::BelongsToAssociation override from hyhull (this was patched in a later version of ActiveFedora).
 - Added explanation comments to ActiveFedora::RelationshipGraph.build_statement method for clarity on need.
hyhull-117  Updated hyhull to use the latest version of hydra-jetty.  The latest hydra-jetty update includes:-
 - solr 4.3.0
 - fedora 3.7
 - The removal of the text extraction libraries from the solr contrib directory (see below)

This commit includes the update of the Fedora and Solr configuration files to reflect the new versions included with Jetty.  hyhull now also includes a text_extraction_support directory that contains all of the libraries required
for extracting text from documents.  The jars can be copied into jetty by running the new rake task 'rake hyhull:config:solr_text_extraction'