Moved Geolocation & Citation

Moved first image to the primary column, citation to the primary column,
and Geolocation to the secondary column.

Calling Geolocation as a separate function, rather than as a bundled
"plugin" append function (see:
http://omeka.org/forums/topic/reordering-plug-ins-on-showphp-page).

Only associating one image/file with each item, so using full size image
on show view (see: http://omeka.org/codex/Functions/item_fullsize).