Add support for specified model version

Author: wonderingwombat

setup.py

@@ -8,7 +8,7 @@ def readme():
         return f.read()
 
 setuptools.setup(name='unmand',
-    version='2.0.1',
+    version='2.1.0',
     description='Helper library for consuming the Unmand API',
     url='https://github.com/unmand-systems/unmand-python',
     author='Josiah Khor',

src/unmand/__init__.py

@@ -107,14 +107,19 @@ def __init__(self, token, test=False):
     def queue(self, file_data, guid=None):
         """Submit a document for prediction"""
         files = {"file": file_data}
+        payload = {
+            'source': 'API',
+        }
 
         if guid:
-            logging.error('Model version selection not supported. Defaulting to the ACTIVE model version.')
+            logging.info('Using specified model version')
+            payload['model'] = guid
 
         result = requests.post(
             f'{self.url}projects/extractions',
             files=files,
-            auth=TokenAuth(self.token)
+            auth=TokenAuth(self.token),
+            data=payload
         )
 
         if result.status_code == requests.codes.created:  # pylint: disable=no-member