IPython Notebook: Add download-file-base section which would be extended by...

IPython Notebook: Add download-file-base section which would be extended by sections requiring common usage

/reviewed-by @kirr  (on !33)

software/ipython_notebook/software.cfg

@@ -23,23 +23,22 @@ eggs +=
   ${pandas:egg}
   ${scikit-learn:egg}
 
-[ipython-notebook-config]
+[download-file-base]
 recipe = hexagonit.recipe.download
 url = ${:_profile_base_location_}/template/${:filename}
 download-only = true
-md5sum = a5bc4ee8539109d1de7ab33b4c2c97ea
 destination = ${buildout:parts-directory}/${:_buildout_section_name_}
-filename = ipython_notebook_config.py.jinja
 mode = 0644
 
+[ipython-notebook-config]
+<= download-file-base
+filename = ipython_notebook_config.py.jinja
+md5sum = a5bc4ee8539109d1de7ab33b4c2c97ea
+
 [ipython-notebook-set-password]
-recipe = hexagonit.recipe.download
-url = ${:_profile_base_location_}/template/${:filename}
-download-only = true
-md5sum = d7d4a7e19d55bf14007819258bf42100
-destination = ${buildout:parts-directory}/${:_buildout_section_name_}
+<= download-file-base
 filename = ipython_set_password.cgi.jinja
-mode = 0644
+md5sum = d7d4a7e19d55bf14007819258bf42100
 
 [instance]
 recipe = slapos.recipe.template