Merge commit 'origin/improvements_for_mainline' into integration

* commit 'origin/improvements_for_mainline':
  Moved compatibility information of possible future release into right spot ( to the top of the release list )
  repo_tests: fixed duplicate test-method name which would redefine the previous one which never ran
  Fixed Diff class which used Commits instead of Blobs - as Blobs contain the path ( in the 'name' member variable ), the a|b_path members of Diff have been removed. Tests were adjusted and run
  git.git.Git.__init__ takes None as default argument as the execute method handles this correctly
  Fixed git.blob.Blob.blame function which would return the text-per-commit as individual characters
  improved repo documentation
  Improved head and tag object documentation slightly
  Added docs for the error module
  Added missing information to docstrings of commit and stats module
  improved git.cmd documentation
  Improved documentation on Actor and Blob

1 files changed, 12 insertions, 2 deletions

diff --git a/lib/git/errors.py b/lib/git/errors.py
index bf882d33..2632d5f3 100644
--- a/lib/git/errors.py
+++ b/lib/git/errors.py
@@ -3,14 +3,24 @@
 #
 # This module is part of GitPython and is released under
 # the BSD License: http://www.opensource.org/licenses/bsd-license.php
+"""
+Module containing all exceptions thrown througout the git package,
+"""
 
 class InvalidGitRepositoryError(Exception):
-    pass
+    """
+    Thrown if the given repository appears to have an invalid format. 
+    """
 
 class NoSuchPathError(Exception):
-    pass
+    """
+    Thrown if a path could not be access by the system.
+    """
 
 class GitCommandError(Exception):
+    """
+    Thrown if execution of the git command fails with non-zero status code.
+    """
     def __init__(self, command, status, stderr=None):
         self.stderr = stderr
         self.status = status