Move Form classes to separate module

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>
Add missing import

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>
Correct inheritence behavior for forms

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>
Move alias population into the User model

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>