v1.0.0 Alpha

Release candidate for the initial MAEC to STIX release.
Not a big deal or anything but I noticed that `config_options.get('whitelist')` is in all the `if/elif/else` blocks. In cases like that I would have probably broken out the lookup:

```python
whitelist = config_options.get('whitelist') # look up once
object_conf = self.supported_objects[object_type] # eh, limiting that lookup to once as well

if config_options["required"]:
    if "mutually_exclusive" in config_options and config_options["mutually_exclusive"]:
        object_conf["mutually_exclusive"][key] = whitelist
    else:
         object_conf["required"][key] = whitelist
else:
     object_conf["optional"][key] = whitelist
```