dropped cor_actions table
remove cor_action model
changed association of update from belongs_to issue to belongs_to part, added part_id to updates table
dropped issues table
update attributes in update model to change issue_id to user_id
corrected typo in part model
updated routes per latest model structure
updated updates_controller to reflect issues not being referenced, but rather part instead
updated updates new view, form, and added new code on the part show to list all updates
updated part show to only show 10 most recent updates, added method for this scope, added index back to updates
updated the edit update view to remove references to issues