Plan for support multiple tfstate (like ecspresso)

[yumafuu]

I wanna lookup multi tfstate files in pulgins secion.

like ↓

plugins:
   - name: tfstate
     config:
       url: s3://tfstate/first.tfstate
     func_prefix: first_
   - name: tfstate
     config:
       url: s3://tfstate/second.tfstate
     func_prefix: second_

May I implement it?

[Songmu]

Nice. Please implement it.