Required files
fog/providers/aws
fog/providers/bluebox
fog/providers/brightbox
fog/providers/dnsimple
fog/providers/dnsmadeeasy
fog/providers/ecloud
fog/providers/go_grid
fog/providers/google
fog/providers/linode
fog/providers/local
fog/providers/new_servers
fog/providers/ninefold
fog/providers/rackspace
fog/providers/slicehost
fog/providers/storm_on_demand
fog/providers/virtual_box
fog/providers/voxel
fog/providers/zerigo