Modify short project description

Author: betatim

setup.py

@@ -28,7 +28,7 @@
     },
     # this should be a whitespace separated string of keywords, not a list
     keywords="reproducible science environments docker",
-    description = "Repo2docker: Turn git repositories into Jupyter enabled Docker Images",
+    description = "Repo2docker: Turn code repositories into Jupyter enabled Docker Images",
     long_description = readme,
     long_description_content_type = 'text/markdown',
     license='BSD',