replacing theme_cdm_preferred_image() function by generic base functionality for all portals
cleaning up unused and old code related to #3050 (unused variable in cdm_taxon_page_title)
fixing name rendering
paging for specimens implemented, common pager functions modified also for taxon search
fixing image url paths
fixing render templates for specific themes
solving #3262 (implement ui to configure render templates in the dataportal admin section) and a according documentation
unifying rendering of OriginalSourceBase; display of determinations and sources for occurrences
avoiding some warnings
recovering palmweb template.php from broken merge and reintregrate
copy drupal7 dataportal themes into trunk