Fix requirements.txt typo

* Merge pull request #89 drjova/fix-requirement.

* NOTE This problem should be addressed in invenio#2431.

Author: egabancho

requirements.txt

@@ -29,7 +29,7 @@ redis==2.9.0
 nydus==0.10.6
 Cerberus==0.5
 matplotlib
-git+https://github.com/CERNDocumentServer/lumberjack.git
 html2text==2014.7.3
 markdown2==2.2.1
 bleach==1.4
+git+git://github.com/CERNDocumentServer/lumberjack.git