Update Schema

[jcantonio]

Hello,
First thanks for this great project.
I ran into the issue when updating a schema.
For an update, I first remove the type then add the new one

delete(schema.TypeMap(), resourceType.Name())
schema.AppendType(resourceType)

It works when the schema doe not contain a field of type object.
But when using an object, it seems that updates have a collision name, as it returns the error:

Schema must contain unique named types but contains multiple types named "objectA".
See code sample:
https://play.golang.org/p/N8iBmXzG-U1

Kind regards,

[jcantonio]

Hi,
I just provided a pull request to fix it:
#518
Cheers,
JClaude