Updates to User roles and types

Matches Transitional V2 in
https://docs.google.com/a/medicmobile.org/spreadsheet/ccc?key=0Ao9l2yegOFn7dEJRTEw1Z3RmZm0wTEo4Nk92NjVocnc
Added functionality for data_entry role

Toward #397
Changed a lone kujua-user to kujua_user

Toward #404
Hide facility-manager until functional existence
Merge pull request #425 from medic/user-mgmt-fixes

Fixes to user roles