added capability to determine if a que instance is new

/users/any tells if there are any users (no auth token)
fixed small settings bug
if this is a new instance, show the new instance wizard
first 2 pages of wizard completed

Page one is a welcome page and page 2 lets you set superadmin's password
page 3: the user can create their own account
fully implemented gui
fully working intial setup dialog

/users/addsuperuser only works when there are no users in the db (and without an authkey)
stop autofilling the login screen
switched to using only one button for wizard
make sure the new user is given the correct permissions
warn user about adding tokens
Merge pull request #4 from 1egoman/feature/newinstance

New instance wizard