Added exceptions to the correct directory..

docs/exceptions.rst

@@ -0,0 +1,45 @@
+Exceptions
+===========
+
+The DocumentCloud Python library and the API have several potential errors. 
+
+Importing Exceptions
+--------------------
+
+>>> from documentcloud.exceptions import APIError, DuplicateObjectError, CredentialsFailedError, DoesNotExistError, MultipleObjectsReturnedError
+
+DocumentCloudError
+-------------------
+
+.. class:: documentcloud.exceptions.DocumentCloudError(Exception)
+    Base class for errors for python-documentcloud
+
+DuplicateObjectError
+---------------------
+
+.. class:: documentcloud.exceptions.DuplicateObjectError(DocumentCloudError)
+    Raised when an object is added to a unique list more than once.
+
+CredentialsFailedError
+----------------------
+
+.. class:: documentcloud.exceptions.CredentialsFailedError(DocumentCloudError)
+    Raised if unable to obtain an access token due to bad login credentials.
+
+APIError
+--------
+
+.. class:: documentcloud.exceptions.APIError(DocumentCloudError)
+    Any other error calling the API. 
+
+DoesNotExistError
+-----------------
+
+.. class:: documentcloud.exceptions.DoesNotExistError(APIError)
+    Raised when the user asks the API for something it cannot find.
+
+MultipleObjectsReturnedError
+----------------------------
+
+.. class:: documentcloud.exceptions.MultipleObjectsReturnedError(APIError)
+    Raised when the API returns multiple objects when it expected one.