v0.1.1

• Add new optional field "user_data" in schema, accepts arbitary string, your VM specific configuration can be stored here.
  Some 3rdparty tool expects certain content be set in this field.
  For example, CiscoCloud/terraform.py (a terraform-ansible bridging tool) interprete 'user_data' as a JSON string:
  { "role": "foobar", ... }
  It uses the 'role' field to group hosts.