update to support Terraform v1.0

Merge pull request #10 from Nadine2016/patch-2

Update README.md

Rename softlayer attributes to iaas_classic

undo sensitive

Merge pull request #7 from Nadine2016/patch-1

readme updates

Fix broken file

Merge pull request #3 from hlucey/patch-3

Added descriptions to match the about page

Add licence

Move variables to varibales.tf