Fix the capitalization of "GitHub".

NEWS.rst

@@ -1265,7 +1265,7 @@ Improved Documentation
 0.8.3
 =====
 
-- Moved main repository to Github: https://github.com/pypa/pip
+- Moved main repository to GitHub: https://github.com/pypa/pip
 - Transferred primary maintenance from Ian to Jannis Leidel, Carl Meyer,
   Brian Rosner
 - Fixed no uninstall-on-upgrade with URL package. Thanks Oliver Tonnhofer.

docs/index.rst

@@ -3,8 +3,8 @@ pip
 
 `User list <http://groups.google.com/group/python-virtualenv>`_ |
 `Dev list <http://groups.google.com/group/pypa-dev>`_ |
-`Github <https://github.com/pypa/pip>`_ |
-`PyPI <https://pypi.org/project/pip/>`_ |
+`GitHub <https://github.com/pypa/pip>`_ |
+`PyPI <https://pypi.python.org/pypi/pip/>`_ |
 User IRC: #pypa |
 Dev IRC: #pypa-dev
 

src/pip/_internal/vcs/git.py

@@ -270,8 +270,8 @@ class Git(VersionControl):
     def get_url_rev(self):
         """
         Prefixes stub URLs like 'user@hostname:user/repo.git' with 'ssh://'.
-        That's required because although they use SSH they sometimes doesn't
-        work with a ssh:// scheme (e.g. Github). But we need a scheme for
+        That's required because although they use SSH they sometimes don't
+        work with a ssh:// scheme (e.g. GitHub). But we need a scheme for
         parsing. Hence we remove it again afterwards and return it as a stub.
         """
         if '://' not in self.url: