Minor updates to map tile browsing

Fixed link back to "raw count" view, changed tile names to tiles not
ugly lat-lons
Added reference to publication
Updates for chronological tile faceted search

Testing capability to use quad-tree indexing of time-spans. :) Added new
JSON service for graphically rendering results, navigation. All very
early stages for testing
Media DOI to citations, better XHTML handeling
Bug fixes for exporting XML