Fix for dropping items in order
Adds token validation to backend
-Front end allows for invite only polls to be created
- Backend now sends tokens to invited users
- Front end now sends token with polls
- Restructure of Token objects to work with Entity Framework
Fix for undraggable items

When the user was logged out, it became impossible to drag items out of
the selection area, because they were not part of the <tbody />. This
forces them in, so they become draggable.
Removes unnecessary line.
Checkbox changes
Merge pull request #72 from tpkelly/develop

Fix for dropping items in order
Merge pull request #74 from stevenhillcox/feature/poll-tokens

Feature/poll tokens