Create a link for `/users` in the sidebar/navbar

Only admins can see this.

Ref #53
Started to create the users page

Ref #53
Remove double border from table on small screens

Ref #53
Fix mobile width that was off by 1px
New users less/js files. Started to style/add hovers

Ref #53
Create new users

Ref #53
Added an extra comment

Ref #53
Show when the user was created at as a timestamp

Ref #53
Use our "checkbox" fontawesome icons everywhere

Also center table cells
Ref #53
Change users admin powers from users table

Ref #53
Started to work on an interface for deleting users.

Also added a POST route at /users/delete
Created the handler, lots of copy from other func.
Ref #53
Allow the deletion of users

Ref #53
Remove session if user deleted their own user.

We remove the session if they try to visit any page that requires
them to login (so everything but /login pretty much).
Merge pull request #59 from lukevers/users

Users