Add support for Fn::Transform within resources

Using Fn::Transform as part of Resources section of the template, like below:

Resources:
    ResourceOne:
        Type: ...
        Properties: ....

    Fn::Transform:
        Name: AWS::Include
        Parameters:
            Location: somefile.yaml

throws a fatal error:

| FAIL FATAL
|
| Illegal cfn - missing Type: id: Fn::Transform

while being a completely valid and working template.

stelligent / cfn_nag

Add support for Fn::Transform within resources #616