update the address of git-cl source files (issue 4967054)

[janek . lilypond]

Reviewers: ,

Message:
http://code.google.com/p/lilypond/issues/detail?id=1872

Description:
update the address of git-cl source files

Please review this at http://codereview.appspot.com/4967054/

Affected files:
  M Documentation/contributor/source-code.itexi


Index: Documentation/contributor/source-code.itexi
diff --git a/Documentation/contributor/source-code.itexi  
b/Documentation/contributor/source-code.itexi
index  
d0136b56e544ac47575db4b8d93e94bdf9d5fbe2..b15e8442488368f883e43f01f601296921f23d1c  
100644
--- a/Documentation/contributor/source-code.itexi
+++ b/Documentation/contributor/source-code.itexi
@@ -924,7 +924,7 @@ LilyDev users should skip over these @q{install}  
instructions.
 Install @command{git-cl} by entering:

 @example
-git clone git://neugierig.org/git-cl.git
+git clone https://github.com/martine/git-cl
 @end example

 @item