Tim G L Lyons c474e5e638 * change CitationtreeModel so that building the view starts from sources so that it displays sources that have no citations
consequent restructuring:
* introduce separate CitationBaseModel module which encapsulates access to both citation and source fields for the views
* introduce separate CitationListModel and CitationTreeModel modules

* move configuration data from libcitationview to citationtreeview and citationlistview, because the two different views have different data


svn: r18110
2011-09-03 22:19:15 +00:00
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