switch to Microsoft.OWin so I can use Katana security (for now)
add user document to persist users
function to generate a password hash
function to compare a password to generated hash
command to create a user
query to get user by username
query to get count of all users
command to make a user an administrator
HTML for sign up form
handler to get the sign-up form
handler to post a user
install Microsoft.Owin.Security.Cookies
wip