4.0.8-Alpha

• Autogenerate and suggestion features for usernames during account registration (partially addresses #569)
• Restrict username characters to a-z0-9.-_
• Require first name by default
• Throttle registration attempts
• Implement User::exists method
• keyupDelay option in ufForm
• More logging of group and role CRUD
• Implement extra:// stream
• Lots of missing translation keys