Allows to disable getting default attributes for a type

Use the following to disable inheritance of the default attributes defined `_default.yaml`

```
---
inherit: false
```

This is non-invasive change, all existing uses should not be affected by this. This allows to annotate a type to not get all defined attributes from the `_default.*` file.
Merge pull request #12 from Asquera/disable-inherit-of-default-attributes

Allows to disable getting default attributes for a type