Updated logic for sidebars.  If the db returns empty array, the sidebars show 'error' message.
Changed logic for sending invitation.  The invitation is now created from the same file that the preview is generated from.
Updated css for invitation page so background fits all contents.
Merge branch 'c1moore_branch' into dev
Added route/controller for candidate application.
Merge branch 'dev' of https://github.com/c1moore/cen3031project into dev