EPEDEV-316, EPEDEV-321, EPEDEV-227, EPEDEV-315, EPEDEV-207

EPEDEV-207: add new unique key property to each resource added instead
of relying on nid
EPEDEV-316: remove N/A option from assessment field through
node_form_alter
EPEDEV-321: on loading LLB edit form or LLB view form, load all resource
node through our custom table "resources_assoc" and assign most current
thumbnail info accordingly
EPEDEV-315: all done except remove the order column and all column
headers on all questions, this is core drupal functionality, don't know
how to remove just yet.  requires running update.php to change menu text
EPEDEV-227: remove all image fields and change them to pure text field,
and bootstrap these new text field to angular app.  Needs to do: running
update.php, fix adHoc upload, redo resource linking for intro slideshow,
background images, and challenge thumbnail