Fixed remaining tests - lets hope that everything is indeed working correctly - as imports changed, every line of code needs to be run to assure all names can be resolved

Author: Byron

objects/submodule/root.py

@@ -48,8 +48,7 @@ def update(self, previous_commit=None, recursive=True, force_remove=False, init=
 		
 		:param previous_commit: If set to a commit'ish, the commit we should use 
 			as the previous commit the HEAD pointed to before it was set to the commit it points to now. 
-			If None, it defaults to ORIG_HEAD otherwise, or the parent of the current
-			commit if it is not given
+			If None, it defaults to HEAD@{1} otherwise
 		:param recursive: if True, the children of submodules will be updated as well
 			using the same technique
 		:param force_remove: If submodules have been deleted, they will be forcibly removed.

refs/head.py

@@ -4,6 +4,8 @@
 
 from git.config import SectionConstraint
 
+from git.util import join_path
+
 from git.exc import GitCommandError
 
 __all__ = ["HEAD", "Head"]

refs/reference.py

@@ -1,5 +1,6 @@
 from symbolic import SymbolicReference
 import os
+from git.objects import Object
 from git.util import (
 					LazyMixin, 
 					Iterable, 

refs/remote.py

@@ -1,5 +1,6 @@
 from head import Head
 from git.util import join_path
+from gitdb.util import join
 
 import os