BREAKING CHANGES:
context.Context added to tfinstall.Find to allow for cancellation, timeouts, etc (#51)TF_WORKSPACE for workspace management, you must use Terraform.WorkspaceSelect (#75)FEATURES:
ErrWorkspaceExists for when workspaces with the same name already exist when calling Terraform.WorkspaceNew (#67)tfinstall.GitRef to support installation of Terraform from a git ref instead of by released version (#51)ReattachOption for plugin reattach functionality (#78)