Enhance user AJAX form element

[regdoug]

Two things:

1. classify as student/faculty/none
2. load full name.

This could be done in many ways.

• Database lookup
• LDAP lookup
• etc

[regdoug]

This will have to await further releases, due to structural issues.

1. hdata_user_load should really be hdata_student_load
2. If the above was done, hdata_user_load could be used to load just basic info like uid (if applicable, name, and type) given a username.
3. LDAP has some problems right now (ldapdata doesn't fill out profile)