Updated import users script to use new args for AccountDriver
Merge branch 'stable' of https://github.com/iPlantCollaborativeOpenSource/atmosphere
Keypair creation moved to Accounts

Also provided a new script for updating the keypair for existing users.
	modified:   atmosphere/settings/local.py.dist
	new file:   scripts/update_keypairs.py
	modified:   service/accounts/openstack.py
Updated requirements for Libcloud 0.14.0